Heat oven to 350 degrees. Combine the first 5 ingredients. Mix ⅔ of this mixture (1½ cups) with rhubarb in greased 1½ quart casserole.
Peel and thinly slice banana and apple; place in casserole. Combine ketchup, lemon rind, and juice; pour over fruit. Sprinkle with remaining bread crumb mixture. Dot with butter.
Bake, covered, for 1¼ to 1½ hours. Serve warm or cold. Garnish with whipped cream or cottage cheese.
Yield: 8 servings