Make your own ketchup. Chop onion, fennel, and celery, and sauté. Add salt, pepper, olive oil, ginger, garlic, cloves, basil, coriander seeds, and red chiles. Add chopped tomatoes (for an unconventional color, use yellow, orange, or green ones) and some water. Simmer until the sauce is reduced by half. Puree in a blender. Add vinegar and sugar. Simmer until the right consistency.