Key Lime Pie-ish Fro Yo Sandwiches

(Adapted from Hungry Girl)

½ cup plain fat-free Greek yogurt

1 ½ tbsp. sugar

1 tbsp. lime juice

graham crackers (we used gluten-free graham crackers, which come in one flavor—graham—but the original recipe called for cinnamon graham crackers)

1. Combine the yogurt, sugar and lime juice in a bowl and mix thoroughly.

2. Cover and freeze for about 30 minutes.

3. Make sandwiches and freeze for 45 minutes or so, until they reach your desired firmness. (In my opinion, 1 hour in our freezer was too long.)