In a large bowl, combine the soup, mayonnaise, sour cream, onion, lemon juice, salt and pepper. Stir in the turkey, rice, celery, water chestnuts and almonds.
Transfer to a greased 13x9-in. baking dish. Bake, uncovered, at 350° for 25 minutes. Combine topping ingredients; sprinkle over turkey mixture. Return to oven; bake until bubbly and golden brown, another 10-15 minutes.