2. Meanwhile, chop the remaining 5 cloves garlic and set aside. Heat 4 tbsp. of the oil in a large skillet over medium heat. Add garlic and cook until golden, about 30 seconds. Add onions, peppers, bell peppers, chives, and oregano and cook, stirring frequently with a wooden spoon, until onions are translucent, 8-10 minutes. Add tomatoes and cook, stirring occasionally, until tomatoes begin to soften, about 10 minutes. Add 1/3 cup water, season to taste with salt and pepper, and cook until vegetables are very soft, about 5 minutes more. Adjust seasonings. Keep tomato sauce warm over lowest heat.