Mix together tuna, bread crumbs and egg. Sauté almonds in butter in skillet until lightly browned. Remove 2 Tbs. from pan and set aside. To remainder in pan, add onions and celery; sauté 3 minutes then remove from heat. Add tuna mixture, mix well and form into 4 flat patties. Turn crushed croutons into plate. Lift patties carefully with spatula to plate; coat with crumbs. Transfer to greased shallow pan and bake at 350 degrees, 15 minutes, until hot. To serve, place tomato slices on serving platter; top each one with a tuna cake. Arrange asparagus spears and potatoes around tuna cakes. Sprinkle with chopped parsley and reserved almonds to serve. With tuna and almonds, these cakes are a source of calcium and vitamin E.