Nothing says tradition quite like apple pie. When you have people lining up for a slice, you don't want to run out. So double the ingredients and bake two pies for the price of one. It won't go to waste.
For 1 people
Combine sugar, cornstarch, salt and cinnamon. Toss with rhubarb and apples until well mixed. Let stand 15 to 20 minutes. Add vanilla and mix well, pour into pastry-lined 9-inch pie plate, dot with butter and cover with the top crust or lattice top and seal. Bake in 400-degree oven about 55 to 60 min. Brush top with melted butter, and sprinkle with a bit of cinnamon sugar.