Preheat oven to 325F.
Mix the crust ingredients in a large bowl and mix with a food processor or hand mixer just until crumbly and combined.
Spread the mixture over a well greased 9x13 pan and lightly pan down. Bake at 325F for 15 minutes.
In the same large bowl, lightly beat the eggs. Add the flour, sugar, salt and optional cinnamon and blend until well combined. Mix in the rhubarb and pour over the par baked crust.
Bake at 325F for 60 minutes or until the center of the bars are set.
Cool completely before serving. Store leftovers in the refrigerator.
Source:
thecreativebite.com