Lasagna without ricotta

1 tablespoon olive oil 1 small onion , chopped 1/2 cup chopped celery 1/2 cup chopped carrot 3 garlic cloves , minced 2 (14 1/2 ounce) cans chopped tomatoes 4[...]

6 red bell peppers 6 yellow bell peppers 15 cups canned Italian plum tomatoes 1 tablespoon fresh herb (savory, sage thyme or rosemary. minced) 4 onions 4[...]