INGREDIENTS
1 cup
all purpose flour
3/4 cup
quick cooking oatmeal
1 cup
brown sugar
1/2 cup
melted butter
1 tsp
cinnamon
4 cups
diced rhubarb, see not below on how to use frozen rhubarb
1 cup
white sugar
1 cup
water
2 tbsp
cornstarch
Vanilla ice cream or whipped cream for serving