Greens-and-Beans Sandwiches

Ingredients
Method
Mash beans, sauce, and lemon juice in a medium bowl until combined and mostly smooth; season with salt. Thinly slice about ⅓ cup fennel stems and tear fronds to measure ¼ cup.
Divide mixture between 2 slices of bread. Layer feta over and top with cucumbers. Scatter fennel stems and fronds over. Close up sandwiches with remaining slices of bread.