This classic Gluten Free Rhubarb Crisp can be baked in an 8x8-inch baking pan, or you can bake it in ramekins for individual servings. If you bake it in ramekins, be sure to place them on a baking sheet in case they bubble over while baking. The baking time can also be decreased by 5-10 minutes. To make this dish nut-free, I would substitute the nuts with chopped sunflower or pumpkin seeds.
You can use the same mixing bowl to stir together the gluten free oats, brown sugar, and 1/2 teaspoon ground cinnamon. Add the butter cubes, and using your fingers, break the butter into smaller pieces, about pea-sized. Stir in the chopped nuts and sprinkle the topping evenly over top of the rhubarb filling.
Bake in the preheated oven for 30-35 minutes or until nice and bubbly. Let it sit for at least 10 minutes before serving to allow the filling to thicken while it cools. We like to serve ours still warm, with a scoop of gluten free vanilla ice cream.
Recipe by Faithfully Gluten Free at http://www.faithfullyglutenfree.com/2009/06/rhubarb-crisp.html