2In a large bowl, mix white sugar, 3 tablespoons flour, strawberries, and rhubarb. Place the mixture in a 9x13 inch baking dish.
3Mix 1 1/2 cups flour, brown sugar, butter, and oats until crumbly. You may want to use a pastry blender for this. Crumble on top of the rhubarb and strawberry mixture.
4Bake 45 minutes in the preheated oven, or until crisp and lightly browned.
Footnotes
Tip
Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.