Heat oil in a large pot over medium-high heat.
Saute onion until soft, then add garlic.
Toss in the beef. Stir until brown.
Add tomato, squash, and water. Mix and cover. Cook for 3 minutes.
Remove cover. Add eggplant, okra, fish sauce and tomato paste. Mix well to blend. Cover. Cook for 7 minutes.
Uncover. Season to taste. Add more salt and pepper if needed. Cover.
Simmer for 5 minutes. Remove from heat.
Serve with plain white rice or your favorite veggies, like corn or potatoes.