In a bowl marinate prawns, mushrooms,mango, green and red capsicum with tikka masala, oil, hung yogurt, ginger garlic paste, and salt.
Mix well and set aside for half an hour.
To assemble the skewers; place one lemon wedge, then green capsicum, mushroom, prawn, mango, red capsicum, mushroom, prawn, mango, pickled onion. Similarly make the rest.
Heat a non stick grill pan, place the skewers and apply little butter from top. Grill to well done and golden.