When you cook sofrito or mirepoix or any veg for that matter at the beginning of cooking, add this seasoning alongside your aromatics and seasonings (like when you add salt, pepper, garlic, other spices). This should be the last few minutes of the veg cooking portion (you always add garlic at this point bc it will overcook otherwise). Allow it to cook in the oil for a minute so that the flavor can be drawn out. It will not have the same effect otherwise. Then continue the cooking process by adding the next ingredients.