With so few ingredients, it’s important to use good-quality whole-milk yogurt.  If you prefer the tang of yogurt, skip the vanilla. You can also use less sugar than what is called for here, say 2/3 of a cup. 

3 cups strained plain or Greek-style yogurt (see below)
3/4 cup sugar
1 teaspoon vanilla extract

Mix together the yogurt, sugar and vanilla. Stir until the sugar is completely dissolved.  Refridgerate for one hour, then freeze in your ice cream maker according to the manufacturer’s instructions.  Enjoy!

Strained yogurt
To make 1 cup of strained yogurt, line a mesh strainer with a few layers of cheese cloth. Then scrape 2 cups of plain-whole milk yogurt into the cheesecloth. Gather ends of cheese cloth and fold them over the yogurt. Place in refridgerator for at least 6 hours. For the recipe above you’ll be straining 6 cups of yogurt.