1. Begin by preheating the oven to 350 degrees F. Spray a rectangular baking dish with cooking spray and set aside. 2. Add cheese, soup, yogurt and melted butter into a large bowl. Mix to combine. 3. Next, add onion and tater tots. Fold until the onion and tater tots are generously covered with the cheese and soup mixture. 4. Spread the potato mixture into the prepared pan. 5. Top off with crushed potato chips. 6. Bake for about 50 to 55 minutes. Serve as a side and enjoy