Preheat oven to 350°. Spray a loaf pan with cooking spray, and set aside.
In a medium skillet, heat olive oil. Saute onions and peppers until they begin to soften. Add garlic. Saute all until soft.
In a large bowl, add cooked vegetables and all remaining ingredients. Stir together with a fork to combine all ingredients well, being careful to not over-mix.
Press into prepared loaf pan. Top with a moderate layer of ketchup. Cover with aluminum foil. Bake for 1 hour or until done, removing the foil for the last 15 minutes. Slice and serve.