IN LARGE, heavy, nonreactive saucepan, heat oil. Add carrots; sauté, stirring, 5 minutes. Add celery; sauté stirring 5 minutes. Add onion; sauté, stirring, until vegetables are soft and very lightly caramelized, about 5 minutes. Add crushed garlic. Sauté, stirring, until garlic is cooked through but not browned, about 3 minutes, Vegetable lasagna recipe.