1. Peel and roughly chop the red onion and bell pepper. Place onion and bell pepper in the bowl fitted with the ultrablade knife and mix at speed 11 for 15 seconds.
2. Replace the ultrablade knife with the mixer. Scrape down the sides of the bowl. Crush garlic with the blade of a knife. Place in the bowl with olive oil and launch the P1 simmer program at 270°F for 4 minutes.
3. Chop the zucchinis, fennel and tomatoes. Place all ingredients, except cilantro, in the bowl. Launch the P2 simmer program at 200°F for 40 minutes.
4. Sprinkle with chopped cilantro leaves and serve hot or cold.