Place pulp of 2 avocados, yogurt, onion, cilantro, lime juice, jalapeƱo,
garlic, and salt in a medium food processor. Pulse process
the mixture until well blended and creamy. Cut remaining 2 avocados
into medium-size pieces. Add avocados and mozzarella cheese. Pulse process just
until blended leaving some pieces of avocado. Cover with plastic
wrap directly on top of the guacamole. Chill 1 hour to allow flavors to
blend.