Hi Panpot
Its just the basic mint sauce with the addition of yellow food colouring this is the recipe=
250g Greek Style Yogurt (Asda)
1 Tsp Jarred Mint
1 Tsp Kashmiri Masala
1 Tsp Sugar
Drizzle of Squeezy Mango Chutney (Asda)
Thin with Milk to desired consistency
pinch of Yellow Food Colouring
Add all the above and blend in a food mixer taste for sweetness / Spiciness that's it really let me know how you get on OK

Layne