De-vein and clean the prawns

Mix chili powder, salt, lemon juice, and turmeric powder with 1 tablespoon of cooking oil in a metal bowl

Marinate the prawns in the mixture

Let rest for 1 hour

While waiting, quarter the bell peppers and remove their seeds

Quarter the tomatoes

Spear the prawns, capsicum, and tomatoes onto the skewers. Alternate as you go

Place on hot grill and cook until well done, turning occasionally to avoid burning them

Serve Immediately