Rhubarb-Cherry Pie
["3 c. (1/2-inch) sliced rhubarb", "1 lb. can (2 c.) pitted tart cherries, drained", "1/4 c. sugar", "1/4 c. quick cooking tapioca", "5 drops red food color", "pastry (for two 9-inch pie crusts)"]
["Combine all ingredients.", "Let stand 15 minutes.", "Line 9-inch pie plate with pastry.", "Add filling.", "Add top crust.", "Flute edges.", "Bake at 400\u00b0 for 40 to 50 minutes.", "Serve warm."]
["rhubarb", "tart cherries", "sugar", "tapioca", "drops red food color", "pastry"]