01 -
Preheat oven to 325°F (165°C).
02 -
Mix the crust ingredients in a large bowl using a food processor or hand mixer until crumbly and combined. Spread the mixture into a well-greased 9×13-inch pan and lightly press down. Bake at 325°F (165°C) for 15 minutes.
03 -
In the same large bowl, lightly beat the eggs. Add flour, sugar, salt, and optional cinnamon, blending until well combined. Mix in the rhubarb and pour the mixture over the partially baked crust.
04 -
Bake at 325°F (165°C) for 60 minutes or until the center of the bars is set.
05 -
Cool completely before serving. Store any leftovers in the refrigerator.