Place the onion, garlic, scallions, red bell pepper in the food processor.
Place a pot over medium-high heat. Add the stock, barley and fava beans, bring to a boil.
Reduce the heat to medium-low. Add the onion mixture salt and pepper and let it simmer for 50 minutes.
Add the potatoes, peas, carrots and ground cumin, cover and cook for 25 minutes more. Add the cilantro and serve.