1. In a saucepan, brown the garlic in one tablespoon olive oil. Add the tomatoes and stir. Add the tomato paste, sugar, salt and pepper. Simmer until the chunks of tomato begin to soften – about 10 minutes, stirring occasionally. Add the balsamic vinegar and fresh cilantro and remove from heat.
2. Place the sea bass in a shallow baking dish. Pour the sauce over the fish and cover. Bake immediately for eight to 10 minutes.
3. Preheat oven to 425 degrees Fahrenheit.