Into a bowl, combine shrimp with all the spices mentioned 'for marinating shrimp'. Keep aside.
Place a saucepan over medium heat, add oil.
Add chopped onions, season with 1 tsp salt.
Saute for a few minutes.
Add ginger-garlic paste, and curry leaves saute till onions turn golden brown. This will take sometime, saute the onions ocassionally to prevent sticking to the pan.
Add tomatoes, cook till mashed up.
Add the marinated shrimp.
Cook covered till shrimp has cooked well and the water dries off.
Open the lid, saute and cook till the roast turns slightly dry.
For a nice vibrant red color, add Kashmiri chili powder, combine well.
Add ground pepper, combine well.
Taste and add ½ tsp salt.
Add chopped cilantro, combine well,
Remove the pan from the heat and keep covered.
Serve along with rice, chapati, poori, appam, idiyappam etc.
Recipe by Cooking with Thas - Wholesome Homemade Recipes at https://thasneen.com/cooking/easy-shrimp-dry-roast-kerala-prawns-roast/