Chef John's Rhubarb Crisp

Preheat oven to 375 degrees F (190 degrees C). Grease a 2-quart baking dish.

Combine rhubarb strawberries white sugar lemon juice and lemon zest together in a bowl.

Stir brown sugar whole wheat flour oats salt and cinnamon together in a bowl. Cut cold butter into oat mixture with a pastry blender until the mixture resembles coarse crumbs and butter pieces are pea-sized.

Pour rhubarb mixture into prepared baking dish. Spread oatmeal mixture evenly over the top.

Bake in the preheated oven until golden and bubbling about 35 minutes.