Wash and dry the blueberries. Set aside.

Put yogurt into a bowl.

Add lemon zest, juice and sweetener.

Give it a good mix, give it a taste, and modify with more lemon/sweetener as preferred.

Add your blueberries in and give it a good mix to make sure it’s all evenly coated. BTW - you can probably eat this as a regular healthy yogurt snack at this point, because it’s probably more delicious than any store bought fruit yogurt.