Heat oil and butter in a medium size saucepan. Sauté onion, carrots and celery for 10 minutes over medium-high heat, stirring frequently. Add minced garlic and cook for another 2-3 minutes. Stir in peppers, crushed tomatoes, Herbs de Provence, salt and pepper. Continue cooking for 20 minutes.
Pour sauce in to baking dish. Arrange vegetables around in circular pattern (see photo). Sprinkle top with seasoning oil. Cover with aluminum foil and bake at 280 for 3 hours. Cool and refrigerate overnight.
Bake for 45 minutes at 350˚F before serving. Sprinkle with the fresh basil, grated Parmesan and a drizzle of the aged balsamic.