What you'll need:
2 pie crusts (one frozen pack from the store has 2 inside! Convenience, man)
1 container of raspberries
1 lemon
1 lime
1 cup of sugar
3 tablespoons of cornstarch
1 egg for an egg wash
Zest your lemon and your lime, then juice half of each. Put that with the sugar, cornstarch, and berries in a bowl, stir, and let it sit for 20-ish minutes. Stir it every once in a while, mash the berries a bit, but mostly just let it chillax. In the mean time, put one disc of crust in your pie pan/tin and trim the edges. Cut the other disc into strips about 1.5 inches wide. Also, preheat your oven to 400 and put a baking sheet in there to heat up. When your filling is all relaxed and well rested, tell it it has to get baked, then pour it into the prepared crust. Top it with the strips formed into a lattice pattern, and then rub some beaten egg across the dough. Wrap the edges with foil to prevent burning, and pop that sucker in the oven on the baking sheet and let it cook for about 45 minutes.
*If you want to make this go over the top, as about 1 teaspoon of nutmeg. It gives it a small kick that makes this better than your average pie