2In an oven-safe dish, combine 1/4 cup all-purpose flour, 2 tbsp granulated sugar, and 1 1/2 tbsp melted butter. Mix until well combined, pat down, and bake for 10 minutes, or until slightly golden.
3While the crust is baking, mix 1 egg, 1/4 cup granulated sugar, juice from 1 lemon, zest from 1/2 lemon, and 1 tsp all-purpose flour in a small bowl.
4Remove the crust from the oven and pour the lemon mixture over it.
5Bake for 20 more minutes until the lemon filling is set.