Combine the beans, avocados, parsley, lemon juice, salt, cumin, pepper, garlic and 3/4 cup of the cilantro in a food processor. Pulse 2 to 3 times, or until the mixture is coarsely chopped. Gradually add the olive oil and process until the mixture is creamy. Transfer to a serving bowl. Sprinkle with the queso fresco and garnish with the remaining 1/4 cup cilantro leaves. Serve with tortilla chips.