Mix together:

• ~4 cups chopped fresh rhubarb (or 4 big apples)
• 1/4 cup flour
• 3/4 cup sugar (half as much for apples)

Add topping:

• 3/4 cup brown sugar
• 1 cup flour
• 1/2 cup rolled oats
• 1/2 cup melted butter

Bake at 375F for 35min.