Creamy Calabacitas

Name: Creamy Calabacitas
Ingredients: 2 tablespoons olive oil; 1 large onion, sliced thin; 4 garlic cloves, minced; 2 sweet bell peppers, sliced thin (red, orange or yellow); 2 cups frozen corn kernels; 1 (4 ounce) can diced green chilies; 1⁄2 fresh jalapeno pepper, seeded & finely diced (optional); 4 -6 medium squash, quartered lengthwise & thinly sliced (summer squash, zucchini or mexican squash); 3 -4 large tomatoes, chopped (or 28oz can diced tomatoes, undrained); 1 cup water (hold if using canned tomatoes); 1 teaspoon salt (or to taste); 1 teaspoon ground black pepper (or to taste); 1 pinch red pepper flakes; 2 cups shredded cheese (Colby-Jack, Mexican mix, Taco mix)