Step 1

Preheat oven to 375 degrees F. Spray a 9 x 13-inch baking dish with cooking spray and set aside.

Step 2

Cook beef and onion in a large skillet over medium-high heat, until meat is no longer pink (about 5-7 minutes). Drain.

Step 3

In a separate bowl, whisk together condensed soups and milk.

Step 4

Add soup mixture, corn, and green beans to the cooked beef; stir to combine. Season with salt and pepper, to taste (I used ½ teaspoon salt and a dash of pepper). Transfer to the prepared baking dish.

Step 5

Sprinkle cheddar cheese over the top. Finish with a layer of Tater Tots.

Step 6

Bake casserole, uncovered, for 35-40 minutes (or until the inside is hot and bubbly and the Tater Tots are crispy and golden brown). If using French-fried onions, add them to the top of your casserole during the final 15 minutes (this will allow them to get browned and crispy without burning).

Step 7

Allow the casserole to rest for about 5-10 minutes before serving.