I love Rhubarb and I can't get it here in Texas, so I love to eat it when I go home to Indiana in the summers. My mom has it growing in the garden - loads of it, so we grew up eating loads of it each summer, or so it seems. Here is a recipe that I made while home during July - you might like to try, if you can get your hands on rhubarb.
1 cp flour
3/4 cp rolled oats
1 cp brown sugar
1 tsp. cinnamon
Mix until crumbly. Press 1/2 of the mixture into an 8x8 inch pan.
Cover with 4 cups chopped rhubarb.
Mix together the following in a medium saucepan:
1 cp sugar
1 cp water
2 TB corn starch
Cook until thick and clear. Add 1 tsp vanilla. Pour mixture over rhubarb. Top with the rest of the crumbs.
Bake at 350 degrees for 1 hr.
Serve warm with ice cream.
Hope you enjoy!