Rhubarb-Pineapple Crumble
["7 c. fresh or frozen rhubarb, cut into 1-inch pieces", "1 (8 oz.) can crushed pineapple, drained", "1 c. brown sugar, packed", "2 Tbsp. cornstarch", "2 tsp. finely shredded lemon peel", "2/3 c. flour", "1/4 c. brown sugar", "1 Tbsp. sugar", "1 Tbsp. chopped ginger", "dash of salt", "1/3 c. butter", "vanilla ice cream"]
["Thaw frozen rhubarb completely, if using, draining well.", "In a large bowl, combine fresh or thawed rhubarb, pineapple and 1 cup brown sugar.", "Let stand 1 hour.", "Drain mixture, reserving juices. If necessary, add water to juices to equal 2/3 cup.", "Place juices in a small saucepan.", "Stir in cornstarch.", "Cook and stir over medium heat until thickened and bubbly.", "Remove from heat.", "Stir into rhubarb and pineapple mixture; stir in lemon peel.", "Place in 2-quart square baking dish.", "In another bowl, combine flour, 1/4 cup brown sugar, sugar, ginger and salt.", "Mix; pour over top of fruit.", "Bake at 350\u00b0 for 1 hour."]
["frozen rhubarb", "pineapple", "brown sugar", "cornstarch", "lemon peel", "flour", "brown sugar", "sugar", "ginger", "salt", "butter", "vanilla ice cream"]