3 cheesy summer casserole Recipes

vegetable oil, summer squash, thinly sliced, vidalia onion, thinly sliced, butter, grated fresh parmesan cheese, shredded sharp cheddar cheese, sour cream, salt & freshly ground black pepper, sleeve cracker, crushed medium to fine (recommended ritz)

butter, divided, summer squash, trimmed and cut into bite-size pieces, zucchini, trimmed and cut into bite-size pieces, salt and ground black pepper to taste, onions, chopped, shredded sharp white cheddar cheese, shredded cheddar cheese, sweetened condensed milk, divided