Sauté onion and garlic clove in a tablespoon of oil and a tablespoon of butter just until the onion and garlic are transparent. While onion and garlic are cooking, slice up the squash and/or zucchini. Drain off oil and butter.
Preheat pot on low to medium heat. Add onion, garlic, squash, zucchini, and okra, then add can of diced tomatoes. Add salt, pepper and basil to taste.
Let simmer on low to medium heat until squash and zucchini are cooked to desired tenderness. Season to taste with more salt and pepper, if desired. Remove from heat and serve.
