In this tutorial, we learn how to make a rhubarb crisp. To start, fresh pick rhubarb from your garden or purchase it form the store. After this place a stick of butter into a bowl and then place it in the microwave with a cover on top until it's completely melted. After this, add in brown sugar, oats, and flour with cinnamon, then mix together with a fork. After everything is combined, place it into a greased baking dish with butter and put into the oven until it's crispy and golden brown. While this is cooking, cut your rhubarb up and then put it into a sauce pan with sugar, butter, and water. When this is done cooking, combine with your oat mixture and enjoy while hot!