01 -
Coat your 9x13-inch pan with some spray and turn your oven on to 350°F (175°C).
02 -
Put cubed potatoes in salted boiling water, cook just until soft, about 7 minutes. Drain and dump them right into that baking dish.
03 -
Pour olive oil into a big pan over medium-high. Toss in the sausage slices and let them brown up, about 5 minutes. Spread them over the potatoes when done.
04 -
Drop butter into the same pan and melt it on medium. Stir in the flour and keep whisking until it loses that raw look and turns light gold, about 1-2 minutes.
05 -
Mix garlic into the roux and let it get fragrant, about half a minute. Slowly pour in milk, then heavy cream, whisking as you go. Now add cumin, garlic powder, salt, pepper, and cheese soup. Keep stirring until it gets thick, 3-4 minutes.
06 -
Take your pan off the heat. Dump in shredded cheddar and stir till it melts and the sauce's super smooth.
07 -
Drench the potatoes and sausage in that cheesy sauce. Slide the pan into the oven. Bake till you see the top brown up and bubble, right around 30 minutes.
08 -
Take out the dish and wait 10 minutes so things hold together better when you serve.