Calabacitas is an exciting, flavorful combination of three different squashes (zucchini, yellow squash, and calabacita squash) with tomatoes, onions, corn, jalapeno, and garlic. The whole dish is sauteed together in a skillet along with aromatic spices like Mexican oregano, cumin, and black pepper. This calabacitas recipe is also con queso, so it also contains a layer of melted cheese on top.