A simple baked dessert with tart rhubarb filling and a golden oat crumble topping.
4 cups rhubarb
3/4 cup sugar
2 tablespoons flour
1 teaspoon vanilla
1 cup oats
3/4 cup flour
1/2 cup brown sugar
1/2 teaspoon cinnamon
1/4 teaspoon salt
1/2 cup butter
Adjust sugar based on tartness. Add strawberries for variation.