Squash Casserole

Name: Squash Casserole
Prep time: 20 min
Cook time: 15 min
Total time: 35 min
Cuisine: American
Ingredients: 6 medium yellow squash (sliced 1/4 inch thick ); 1 med-large yellow onion (chopped); 1/3 cup water; 2 cups sharp cheddar cheese (shredded); 1 1/2 cups sour cream (full-fat); 2 large eggs; 1/2 teaspoon sea salt (more to taste); 1/2 Tablespoon fresh thyme; 1/4 teaspoon ground black pepper; 1/2 cup parmesan cheese (grated); 30 Ritz crackers (crushed); 1/2 cup unsalted butter (melted. 1 stick )