PREHEAT oven to 350° F. Grease 13 x 9-inch baking dish.
COMBINE evaporated milk and condensed soup in baking dish with wire whisk until smooth. Add salsa and black pepper; mix well. Add vegetables, turkey and rice; mix well. Cover dish tightly with foil.
BAKE for 35 minutes. Uncover; top with cheese. Bake for an additional 10 to 15 minutes or until cheese is melted and mixture is bubbly. Let stand for 5 minutes before serving.
COMBINE sour cream with water in small bowl. Drizzle over casserole. Top with avocado slices just prior to serving.
• To keep avocado slices from browning, squeeze fresh lime juice over slices.