Pulse chick peas, olive oil, tahini, lime juice, and garlic in a food processor until smooth, about 2 minutes. Season with salt and pepper to taste (I did a scant 1/2 tsp salt and about 1/8 tsp pepper), add cumin and avocados and pulse mixture until smooth and creamy, about 1 - 2 minutes longer. Serve topped with more olive oil if desired and sprinkle with cilantro and red pepper flakes. Serve with pita chips or tortilla chips.