Cheeseburger Casserole with Tater Tots®

Ingredients (6)

• + 1 large onion, chopped into 1-inch pieces add to pantry
• + butter-flavored cooking spray (such as Pam®) add to pantry
• ✓ 2 pounds ground beef
• + 2 (10.75 ounce) cans condensed golden mushroom soup (such as Campbell's®) add to pantry
• + 3 cups shredded sharp Cheddar cheese add to pantry
• + 1 (32 ounce) package frozen bite-size potato nuggets (such as Tater Tots®) add to pantry