Strawberry-Rhubarb Pie
["3 c. diced rhubarb", "3 c. sliced strawberries", "2 to 2 1/4 c. sugar", "3/4 c. cornstarch", "3 Tbsp. butter"]
["Mix all ingredients well, and pour into a 9-inch pastry-lined pie pan.", "Cover with top crust.", "Bake at 425\u00b0 for ten minutes; reduce heat to 350\u00b0 and bake until bubbly."]
["rhubarb", "strawberries", "sugar", "cornstarch", "butter"]