Prepare the fruit: Wash and dry all fresh fruits thoroughly. For berry frozen yogurt, slice strawberries and combine with other berries. For tropical version, peel and dice mango, and prepare pineapple chunks.

Sweeten the yogurt: In a large mixing bowl, combine yogurt with your chosen sweetener (honey, maple syrup, or agave). Add vanilla extract and citrus juice, then whisk until smooth and well incorporated.

Blend the mixture: Place the fruit and yogurt mixture in a blender or food processor. Pulse until you achieve a smooth consistency with some fruit chunks remaining for texture.

Chill and freeze: Transfer the mixture to an ice cream maker and churn according to manufacturer's instructions, usually 20-30 minutes until thick and creamy.

Final freeze: If you don't have an ice cream maker, pour the mixture into a shallow container and freeze for 2 hours. Remove and stir vigorously with a fork to break up ice crystals, then return to freezer for another 2 hours. Repeat once more for perfect texture.

Serve and enjoy: Scoop into bowls or cones and garnish with fresh fruit, nuts, or a drizzle of honey for extra sweetness.