Step 1

Preheat the oven to 350 degrees F and move the rack to the middle position.

Step 2

Add the oil and ground beef to a skillet. Cook for 5 minutes over medium-high heat, breaking up the meat as you go.

Step 3

Stir in the onion, chili powder, garlic powder, and ground cumin.

Step 4

Continue cooking for another 5 minutes.

Step 5

Meanwhile, add the crushed cheese-flavored chips in an even layer to the bottom of a 9x13-inch casserole dish.

Step 6

Drain the skillet of any excess fat.

Step 7

Stir in the beans, corn, salsa, and half the cheese.

Step 8

Let it warm through until the cheese melts.

Step 9

Spoon the beef mixture evenly over the cheese-flavored tortillas.

Step 10

Top the casserole with the remaining cheese. Bake until warmed through and the cheese is melty, about 15-20 minutes.

Step 11

Serve the casserole as-is or with your favorite toppings.