Here is another recipe from Grandma Renzelman.
Strawberry and Rhubarb Pie
2 1/2 c. fresh or frozen Rhubarb cut into 1/2 inch pieces
1 Pt. fresh or frozen strawberry slices
1 1/4 c. sugar
1/3 c. orange juice
2 T quick tapioca
2 tsp. grated orange peel
1/4 tsp. salt
2 T. butter
2 T. sugar
Combine fruit, sugar, juice, tapioca, orange peel, and salt. Let stand 15 minutes. Spoon mixture into Pie Shell. Dot with butter. Cover with Pie Crust. Sprinkle with 2 T. sugar.
Bake at 375 degrees for 1 hour and 15 minutes. Watch that the crust doesn't burn - keep on lower rack of the oven.