Combine crust ingredients in large mixing bowl.
Mixture will resemble large crumbs.
Press into 8x8-inch greased baking dish. Bake in 325°F oven for 25 minutes.
Prepare the lemon curd filling.
Pour over baked crust and bake for another 25 minutes.
Refrigerate, then cut into bars and sprinkle with powdered sugar.
You might also enjoy Lemon Poppy Seed Shortbread Cookies.