Squash Casserole
| 1 large onion, chopped |
| 4 Tbsp (1/2 stick) butter |
| 3 cups cooked squash, drained with all water squeezed out |
| 1 cup crushed Ritz crackers, plus additional for topping |
| 1/2 cup sour cream |
| 1/2 tsp salt |
| 1/4 tsp pepper |
| 1/4 tsp garlic powder |
| 1 cup grated cheddar cheese |