Peel and pit the nectarines. Put the nectarines, sugar, and lemon juice into your blender and blend until you have a very smooth puree. Add the Greek yogurt and blend until the mixture is well combined.

Chill this mixture thoroughly and then process in your ice cream maker. Put the processed frozen yogurt back in your freezer for a few hours to let it firm up.

Cook's note: I made my yogurt in my Instant Pot. It is a long process, but the yogurt was quite good and worked very well in this recipe.