4 c. sliced rhubarb
3/4 c. sugar
3 tbsp. flour
1/4 tsp. cinnamon

Topping:

1/4 c. oatmeal
1/4 c. firmly packed brown sugar
1/4 c. flour
1/4 tsp. cinnamon

In large bowl, combine rhubarb, sugar, flour and cinnamon. Mix well. Spoon rhubarb mixture into 8-inch square pan. In a small bowl, combine the topping, oatmeal, brown sugar, flour and cinnamon. Sprinkle topping over rhubarb. Microwave on High, 12 to 15 minutes.