Step 1) In a large skillet over medium high heat, add oil, onions, peppers, garlic, salt and sauté for 4 to 6 minutes. Remove from heat and set aside to cool.
Step 2) Combine cooled vegetable mix, cilantro, oregano, tomato, green olives and black pepper in the bowl of a food processor. Pulse until finely chopped.
Step 3) Serve as a table condiment or as ingredient for seasoning Puerto Rican recipes.
Recipe Tip: Sofrito can be frozen in a resealable plastic bag or ice cube trays for future use.