Reduce skillet heat to about 250 degrees F. Place tortilla on the skillet, then 1/2 cup cheese and about 3/4 cup chicken mixture. Top with 1/2 an avocado, then another 1/2 cup cheese and another tortilla. Gently press down to meld quesadilla. Cook for about 3 minutes, then flip over and cook an additional 2 minutes. Remove from heat and let stand 1-2 minutes. Slice into triangles with a pizza cutter and serve with sour cream, salsa and additional cilantro. Makes 2 quesadillas.