Preparation Steps

• Preheat oven to 375°F (190°C). Grease and flour a 9x13 inch baking pan.
• In a large bowl, combine the flour, rolled oats, 1 cup granulated sugar, and salt for the crust. Pour in the melted butter and stir until well combined and crumbly.
  1.5 cups all-purpose flour
• Press about two-thirds of the oatmeal mixture evenly into the bottom of the prepared baking pan to form the crust.
• In a separate bowl, gently toss the chopped rhubarb with 1 cup granulated sugar, 3 tablespoons flour, and cinnamon until evenly coated.
  1.5 cups all-purpose flour
• Spread the rhubarb filling evenly over the oatmeal crust.
• Sprinkle the remaining oatmeal mixture evenly over the rhubarb filling.
• Bake for 30-40 minutes, or until the topping is golden brown and the rhubarb filling is bubbly.
• Let cool completely before cutting into bars.