2 1/2 cups rhubarb (diced) 2/3 cup sugar ½ stick butter 1/2 cup flour 1 tablespoon cornstarch 1 teaspoon vanilla extract 1/2 teaspoon salt 1 cup flour 3/4 cup rolled oats 1/2 cup sugar ½ teaspoon cardamom 1/2 teaspoon salt 1 stick butter (cold, cut into small cubes)Ingredients
For the fruit:
For the cobbler: