To prepare a hide the veggies please summer squash and zucchini corn casserole recipe, first you need to prepare your ingredients. First, you'll need your squash, zucchini, and corn. You can buy them at your local farmer's market, or you can cook them yourself at home. Then, add your dry ingredients to the wet ingredients and mix until everything is well combined. Next, heat your oven to 375 degrees F (190 degrees C) and bake the casserole for 30 to 35 minutes or until the top is brown and bubbly. Remove from the oven and sprinkle with grated Parmesan cheese.