My most recent fave is this:
Mix 2.5 cups cream, 1 cup milk, .25 cups sugar, and the zest of 2 limes in a pot. Heat it til it begins to steam a bit, but NOT boil. Meanwhile, in a big bowl, mix 4 egg yolks, another .25 cup of sugar, and a pinch of salt together. When the milk and cream get hot, pour them into the bowl, stirring the whole time, then dump the whole mess back in the pot. Heat until almost boiling, stirring often. Pour back into bowl (now cleaned) through a fine mesh strainer. Squeeze in a tablespoon or two of lime juice and put in the freezer to cool down. When it is cool-ish, put it in the ice cream maker.
Lime ice cream --- so yummy. Then take some cream and heat it on the stove til almost boiling then dump some hunks of white chocolate in it. Take off the heat and stir.
Lime ice cream with white chocolate sauce = one of the best things ever.
This is my most recent favorite - I have a bunch if you want more.