In a pan over medium heat, heat about 1 tablespoon of the oil. Add onions and garlic and cook until limp. Add ground beef and cook, breaking apart with back of spoon, for about 10 to 15 minutes until lightly browned. Drain excess fat.
Add tomato sauce, soy sauce, water and sugar. Bring to a boil for about 1 to 2 minutes, stirring until sugar is dissolved. Lower heat, cover and simmer until meat is cooked through and liquid is mostly reduced.
Add green peas and cook for about 3 to 5 minutes. Season with salt and pepper to taste.
Serve hot with steamed rice, fried eggs and fried bananas.