Irresistible Zucchini Cheese Casserole

Category: Breads and Pastries Without Borders

This dish throws together sweet tomatoes, chopped onion, and snappy green bell pepper with slices of zucchini. Toss 'em all in olive oil and sprinkle good old Italian seasoning over everything. Layer mozzarella cheese right in there, pop it in the oven, and wait till it’s bubbly and browned on top. Just before you eat, toss on parsley and some red chili flakes for a boost. It’s warm, cheesy, and honestly, the perfect thing next to your weeknight chicken or summer meal. Switch up the veggies or cheeses to fit what you’ve got, and it stores great if you want to make it ahead.

Monica
By Monica Monica
Updated on Thu, 05 Jun 2025 13:44:31 GMT
Casserole packed with tomatoes and melted cheese. Pin
Casserole packed with tomatoes and melted cheese. | flavorsfuse.com

Baked zucchini loaded with gooey cheese is honestly a cozy dish that catches everyone off guard with how much they love it. The veggies get all soft in the oven, then mozzarella turns bubbly and gooey on top. It’s an easy favorite for summer hauls but honestly I throw it together anytime I spot good looking zucchini. I make this for busy weeknights and even the stubborn eaters usually ask for more.

Honestly the first time I put this together my kid swore up and down she would not touch zucchini. But after one bite where the cheese was all gooey and golden, she had another scoop right away, no questions asked.

Tasty Ingredients

  • Zucchini: Pick zucchini that feels firm and looks shiny for the best bite. This is the main event.
  • Green bell pepper: Crunchy, just a little sweet. Use ones that feel firm and look fresh.
  • Onion: White or yellow both work well. Go for fresh to keep the flavor bright.
  • Grape tomatoes: Juicy and just the right hit of tang. Grab them if they look lively and shiny.
  • Olive oil: Gives that silky, golden touch when baking. Splash in your best extra virgin if you have it.
  • Garlic powder: Simple way to get even, quick flavor in every bite.
  • Italian seasoning: Mix of oregano, basil, thyme and more. It’s what adds the classic Italian touch. Use a good blend if you can.
  • Salt: Wakes up all those veggie flavors.
  • Freshly cracked black pepper: Bright flavor and some heat—cracked fresh is tastier.
  • Mozzarella cheese: Full fat melts the best, and grating it yourself makes everything creamier. Grab pre-shredded when you’re in a rush.
  • Fresh parsley: Chopped up for a blast of fresh color before serving.
  • Crushed red chili pepper flakes: Sprinkle on for some spicy kick, but only if you like a little heat.

Easy How-To Steps

Garnish and Enjoy:
After pulling the pan out, let it sit for a couple of minutes. Sprinkle fresh parsley and chili flakes on top. Scoop it up while warm and enjoy those cheese pulls.
Finish with Cheese:
Pull out the tray carefully and cover everything with the rest of the mozzarella. Don’t rush—this step is the secret to that melty top layer.
Final Bake:
Pop the dish back in for another 10 minutes. When the cheese is bubbly and tinged with brown on the edges, you’re good.
Bake Part One:
Get the pan into your hot oven. Bake for about 20 minutes so the zucchini softens up but still holds its shape. This gets the flavors mingling.
Layer in the Dish:
Dump everything from the bowl into a 9 x 13 baking dish. Spread it evenly so things roast the same and cheese later melts nicely over all the veggies.
Add First Cheese:
Toss in half your grated mozzarella right into the veggie bowl. Mix so cheesy bits land all through the veggies for melty goodness in every bite.
Season Everything:
Drizzle oil over your chopped veggies, then sprinkle in garlic powder, Italian spice blend, salt, and pepper. Give it all a solid stir so every piece is slicked and seasoned.
Chop the Veggies:
Grab a big bowl and toss in bite-sized zucchini and bell pepper, diced onion, and halved grape tomatoes. Work on your chopping board and throw everything together.
Get the Oven Ready:
Set your oven to 375°F (190°C). Make sure your rack is in the center so everything cooks consistently.
A casserole packed with zucchini, cheese, and tomatoes. Pin
A casserole packed with zucchini, cheese, and tomatoes. | flavorsfuse.com

Mozzarella is definitely the showstopper here. I’ve experimented with cheddar but nothing melts and stretches like mozzarella does—can’t beat that. It usually ends in everyone scrambling for that last gooey bite at family dinners.

Storing Leftovers

Stash leftovers in a sealed container in the fridge and this baked zucchini will be tasty for up to three days. For best results, reheat in the oven or toaster oven so the cheese stays gooey and you avoid sogginess. If you’re in a hurry, a quick blast in the microwave works fine but the cheese is nicest when warmed gently.

Swapping Ingredients

No zucchini? Yellow squash works perfectly. Out of green peppers? Red or orange give it extra sweetness. Short on mozzarella? Try Monterey Jack or mild provolone, but leave super hard cheeses like parmesan out—melty is the goal here.

Ways To Eat This

I like serving this up next to grilled chicken or fish for a solid meal. It’s also great tossed with pasta or piled on some crusty bread to soak up all that cheesy goodness. Brings something special to summer get-togethers or potlucks too.

A serving bowl full of veggie bake with a spoon resting inside. Pin
A serving bowl full of veggie bake with a spoon resting inside. | flavorsfuse.com

The Backstory

Bakes like this have roots all over the Mediterranean, where there’s loads of summer squash to go around. Tossing in cheese and herbs turns a bunch of vegetables into a cozy meal that brings everyone together. It’s that comfy, nostalgic casserole vibe mixed with the punchy taste of fresh produce.

FAQs About the Recipe

→ How do I prevent watery zucchini?

Chop your zucchini, then pat it dry with a towel. Don’t bake it too long or it sogs out. Want it even less wet? Salt the pieces a bit and dab dry before using.

→ Can I use other cheeses for this dish?

Go for it—try cheddar, provolone, or Monterey Jack if you like. They all melt and bring their own flavor twist.

→ Is it necessary to peel the zucchini?

No need. The skin is tasty, adds color, and is good for you. Just wash it well. Peel it if that’s your thing, but you don’t have to.

→ How do I store leftovers?

Let everything cool, then move it to an airtight box. Stick it in the fridge for up to three days. Warm it up gently when you want more.

→ Can I prepare this dish ahead?

Definitely! Put it all together right up to the cheese, cover it, and keep it chilled. Top with cheese and bake when you’re ready.

→ What can I serve alongside this dish?

It’s great with grilled meat, roast chicken, or some thick slices of crusty bread. Makes a solid pick for Italian or Mediterranean meals too.

Cheesy Zucchini Bake

Super simple zucchini and veggies baked with stretchy mozzarella—cheesy, tasty, and something everyone can dig into.

Prep Time
10 min
Cooking Time
30 min
Total Time
40 min
By Monica: Monica

Category: Fusion Baking

Skill Level: Beginner-Friendly

Cuisine Style: American

Yield: 6 Servings (1 big casserole pan)

Dietary Preferences: Vegetarian, Gluten-Free

What You'll Need

→ Cheese & Garnish

01 1 tablespoon fresh parsley, chopped
02 1/2 teaspoon red chili flakes, crushed (if you want more spice)
03 1 cup mozzarella cheese, shredded, split in half

→ Vegetables & Seasoning

04 1 teaspoon freshly cracked black pepper
05 1 cup grape tomatoes, sliced in half
06 2 tablespoons olive oil
07 1 green bell pepper, diced up
08 1 teaspoon dried Italian herbs
09 1 onion, chopped small
10 1/2 teaspoon salt
11 1 teaspoon garlic powder
12 2 large zucchini, in chunks

Step-by-Step Guide

Step 01

Toss on the chopped parsley and those chili flakes if you're in the mood, then scoop it up while it's still nice and hot.

Step 02

Pop the baking dish back in for about 10 minutes, just until that top cheese looks all gooey and starts to turn golden.

Step 03

Take it out and cover everything with the rest of your mozzarella so the top gets perfectly cheesy.

Step 04

Stick the pan in the oven for 20 minutes, so your zucchini can start to get a little soft but not mushy.

Step 05

Dump all that good veggie-cheese mix into your 9×13-inch pan and spread it out so it's nice and even.

Step 06

Mix in half of the shredded mozzarella so it melts together with your veggies.

Step 07

Toss the zucchini, green pepper, onion, tomato halves, olive oil, salt, black pepper, Italian herbs, and garlic powder in a big bowl until they're all glossy and seasoned.

Step 08

Heat up your oven to 375°F (about 190°C) so it's ready when you are.

Additional Notes

  1. For crunchier veggies, grab zucchini that's nice and firm. Let everything cool for a few minutes before cutting in—makes a difference!

Essential Tools

  • 9×13-inch baking dish
  • Large mixing bowl
  • Knife
  • Cutting board
  • Measuring cups
  • Measuring spoons
  • Oven

Allergy Information

Review each ingredient for possible allergens and consult a healthcare professional if you're unsure.
  • Has dairy (mozzarella cheese).

Nutritional Facts (Per Serving)

This info is for reference purposes only and isn't a substitute for medical advice.
  • Calories: 140
  • Fats: 9 g
  • Carbohydrates: 7 g
  • Proteins: 7 g