To prepare chipotle sauce, combine first 3 ingredients in a blender; process until smooth. Pour sauce into a bowl; stir in sour cream and 1 tablespoon juice.
To prepare chicken, toss avocado with 1 tablespoon juice. Cut a horizontal slit through thickest portion of each breast half to form a pocket. Stuff 1 avocado slice and 2 tablespoons cheese into each pocket. Sprinkle chicken with salt and pepper, and dredge chicken in flour. Dip chicken in egg whites; dredge in breadcrumbs.
Heat oil in a large nonstick skillet coated with cooking spray over medium-high heat. Add chicken; sauté 6 minutes on each side or until chicken is done.
Toss pasta with olives and parsley. Place 1 1/3 cups pasta on each of 6 plates. Arrange chicken on pasta; top each serving with about 3 tablespoons chipotle sauce.