Blueberry Frozen Yoghurt

What's bright purple and amazingly refreshing? My Blueberry Frozen Yoghurt. No artificial colours, sweeteners or preservatives and just four ingredients. The only thing quicker than making it, will be eating it (*if disappearance speeds in my house were anything to go by!) If you like it firmer, you can freeze it further after mixing. 

For two portions you'll need:

• 250g Blueberries (frozen)
  
• 100g Greek Yoghurt
  
• 1/2 Tablespoon Lemon juice
  
• 1 Tablespoon Honey