You need 
Tiger Shrimp – approx 20
Onions – cut in squares (2 medium)
Tomatoes – Cubed (2 medium)
Green Chillies

Marinade
Lemon Juice – 2 lemons
Red Chilli Powder
Lemon Zest Seasoning – any – 1/2 tsp
Oil – 1/2 tbsp
Salt – 1/2 tsp
Black Pepper – 1/4 tsp
Honey – 1 tbsp
Coriander – finely chopped

Steps
Marinate the Shrimps in the above mentioned marinade for 30-45 min. Skewer the Onion/Tomato/Shrimp/Green Chilli . Spray the cooking spray on the skewers. Grill at H1 for 12-15 minutes. Serve hot