2 cups white rice, uncooked
1/2 medium white onion, diced
3 tablespoons butter
3 tablespoons all-purpose flour
1 2/3 cup milk
2 large eggs
1 1/2 cups frozen peas
1/2 teaspoon garlic powder
1 1/2 cups cheddar cheese, grated
1/2 cup sour cream
2 (5 oz) cans tuna, drained
1 cup Ritz crackers, crushed
1/2 cup Parmesan cheese, grated
Kosher salt and freshly ground black pepper, to taste.