Mix together yogurt, vanilla, and strawberries in a bowl.
3 cups vanilla yogurt, 1 teaspoon vanilla, 1 cup strawberries
Add frozen yogurt base to the canister side of your ice cream ball and seal to ice cream maker.
If using an ice cream ball, flip over ice cream ball and open the second side. Add as much ice as will fit, then pour in 1/2 cup rock salt. Close the ice side and shake to redistribute your ice cubes. Open and add more ice to fill, then seal again.
If using an ice cream maker, process according to instructions.
If using the ice cream ball, roll and shake ice cream ball for five minutes. Open the frozen yogurt side and use a wooden spoon to scrape the frozen edges off and stir into the rest of the mix. Seal again and repeat the process until the entire mixture is frozen.
Remove all the ice and fill the ice section with water. Swish around for twenty seconds then dump out. This helps loosen frozen yogurt and make it easier to remove for serving and storing in your freezer.
Scrape frozen yogurt into a container and freeze at least two hours.
This will last a couple weeks in your freezer. Let it sit at room temperature for 5-10 minutes to soften a bit before serving.