Ingredients: 4 tablespoons butter 1/2 yellow onion, diced 2 ears sweet corn, kernels removed 2 large zucchini, thinly sliced (about 4 cups) 8 ounces sliced mushrooms 1 tablespoon dried basil 1 teaspoon dried oregano 1/2 teaspoon salt 12 ounces shredded cheese (such as Mozzarella and Swiss…