The key lime pie recipe I use is easily my favorite pie out there, I'm a huge sucker for citrus and it's super simple to make :D

The crust is super simple to make, just semi-finely blend or crush a bunch of graham crackers into small crumbs (not so big that there's chunks laying around in it but not to the point where it's a powder) and mix some sugar and melted butter into it until it becomes somewhat of a dough, then spread it out into a pie pan/tin. You don't have to bake it yet but if you wanna make sure it stays in-tact you can put it in the fridge for a few hours before you use it

If you decide not to chill it, preheat your oven to 375F (190C)

For the filling mix 5 beaten egg yolks, a can (usually 14 ounces) of sweetened condensed milk, and half a cup of key lime juice in a bowl and mix it thoroughly. Pour it into the crust in the pan you put it in and bake it for about 15 minutes or until you can tell it's set properly if your oven's temperature is a bit off. Once it's done, leave it out until it's completely cooled and optionally put it in the fridge to make sure it's firm enough

After that it's done and you can do whatever else you want with it!! Most people just put whipped cream on it but you can play around and see what you like! If you work efficiently enough it only takes like half to 3/4 of an hour from start to finish so it's a great option if you like citrus stuff and just wanna make a real quick pie :) (Additionally it's kinda the go-to option in the Homestuck community for making a pleasant imitation of a sopor slime pie, just add an assload of green food coloring to it when you're mixing the filling lol)