Combine graham cracker crumbs, melted butter, and granulated sugar in a bowl, stirring until the texture resembles wet sand. Press this mixture firmly into the bottom of a 9-inch springform pan, creating an even layer that'll support everything above it.

Beat softened cream cheese in your mixer for 2 minutes until completely smooth—this step eliminates hidden lumps that wreck the filling's texture. I always scrape the bowl halfway through because that's where cream cheese hides in the corners.

Add sweetened condensed milk to the cream cheese and beat for 1 minute until fully combined. The mixture should look pale and thick at this point, which means the gelatin will set it properly later.

Fold in fresh lemon juice, lemon zest, and vanilla extract gently by hand using a spatula—don't overmix here because you're about to add whipped topping. This folding technique keeps the filling from becoming dense, which is why rushing this step creates disappointing results.

In a separate bowl, whip the whipped topping with powdered sugar and gelatin for 30 seconds until combined. Fold this into your lemon mixture in two additions, being careful not to deflate all those air bubbles you just created.

Pour the filling into your crust and smooth the top with an offset spatula or the back of a spoon. This is the moment you want it looking intentional, so take 10 seconds to make it pretty before moving forward.

Cover with plastic wrap and refrigerate for 24 hours—I know that feels long, but the gelatin needs full time to set completely. Tom always tries to cut into it after 8 hours, and every single time he learns that patience matters here.

Top with fresh sliced strawberries just before serving, as they'll weep into the cake if left overnight.