01 -
Set your oven to 350°F (180°C) and move the rack to the middle row.
02 -
Stir the graham crumbs, melted butter, and sugar until they look evenly mixed. Push it into a 9-inch deep pan to cover the bottom and sides.
03 -
Blend the condensed milk, yolks, and zest with a whisk. Slowly add lemon juice, continuing to mix until it thickens up.
04 -
Pour the lemon mixture over the crust. Bake for about 25-30 minutes, just until the edges are firm and the middle has a slight wobble.
05 -
Let it sit on a cooling rack, covered, then pop it in the fridge for at least 3 hours (better if left 5-6 or overnight) till it firms up.