Summer Squash with tortillas

2 -3 medium summer squash (zucchini, yellow, or both) 1 medium onion 3 tablespoons butter (butter gives a richer flavor) or 3 tablespoons olive oil (butter[...]

3/4 cup chopped onion 2 garlic cloves , minced 1 tablespoon olive oil 3 cups chopped zucchini or 3 cups chopped summer squash 2 ounces green chili peppers ,[...]