Brought this to a party and didn't have enough to go around. Need to make more next time

Feel free to experiment with different types of apples to find your perfect flavor combination – Granny Smith and Honeycrisp are both great choices. If you like a bit of crunch, you can sprinkle some chopped pecans or walnuts over the apple slices before pouring in the custard. For a dairy-free version, you can substitute the buttermilk with almond milk mixed with a tablespoon of lemon juice.