Rhubarb sauce is simple to make, just cook it as you would an apple sauce; rhubarb with some honey (or sugar) and whatever spices you like in a sauce. We have made it with and without cinnamon.
Apple (or Rhubarb) Sauce Bread
4 tablespoons butter; melted
1/4 cup honey
1 large egg
1 cup apple sauce or rhubarb sauce
2 cups flour
1 tablespoon baking powder
1/4 teaspoon baking soda
1 teaspoon cinnamon
1/4 teaspoon cloves
1/4 cup walnuts; chopped
Preheat oven to 350°F. Grease a 9" loaf pan.
Combine melted butter and honey. Add the egg and apple (or rhubarb) sauce and mix well.
Sift together the dry ingredients and stir into the butter and sauce mixture.
Fold in walnuts.
Spoon into prepared pan and bake 50 to 60 minutes.
Remove from pan and cool on a wire rack.