4 c. whole frozen strawberries
4 tbsp. vanilla yogurt
2 sugar substitutes use more sugar substitutes if berries are not sweet enough

Puree the frozen strawberries in a food processor until crumbly. Let rest for 30 seconds; add the yogurt and sweetener and puree until smooth, scraping down the sides of the food processor often. Place in a 1 quart plastic container; cover and freeze until serving.