Step 1

Heat oven to 375°F. Grease an 8 or 9-inch pie or tart pan. Place graham cracker crumbs, butter, sugar and pinch of salt in a large mixing bowl, stirring until combined. Dump this sand-like mixture into the tart pan and press evenly to create a thin crust. Bake for about 10 minutes. Remove from oven and cool on a wire rack.

Step 2

Lower oven to 325°F. In a large bowl, mix together the lime juice, zest, egg yolks and condensed milk. Pour into crust and bake for 15 minutes. Remove from oven, cool on a wire rack and refrigerate until serving.