Heat oven: To 350°F (176°C).

Make crust: Combine graham crumbs, sugar and salt in a medium bowl and stir until mixed. Add butter and stir until crumbs are evenly coated. Press crumbs into the bottom and up the sides of a standard 9-inch pie dish. I like to use the outer edge of a heavy measuring cup to press in neat, firm sides but nobody will be the wiser if you just use your fingertips. Bake crust until lightly browned, about 10 minutes. Set on cooling rack while you prepare filling. Leave oven on.

Make filling: Zest limes into the bottom of a medium bowl until you have 1 1/2 tablespoons. Beat zest and egg yolks with an electric mixer until pale and thick, about 5 minutes. Add sweetened condensed milk and beat until thickened again, about 3 minutes more. Squeeze zested limes until you have 2/3 cups juice. Whisk into yolk mixture until combined. Pour into graham crust and bake pie for another 10 minutes, until set but not browned on top at all. Let pie cool completely before adding topping.

Let pie cool completely before adding topping — you can do this outside (thank you, January!) or even in your freezer (but don’t forget about it) to hasten the process, and your pie reward, along.

Make topping: In a medium bowl, beat cream and sugar until soft peaks are formed. Spread over top of chilled pie. Ideally, pie should be chilled at least another 2 to 3 hours with the cream on top so that it can fully set before you take a slice, but whether that happens is between you and your pie.

Key lime pie keeps in fridge for a week, though certainly not around here.