In a kadai, add butter, then add the chopped onions, green chillies, ginger, garlic and saute till the onions become transparent.Add the chopped tomatoes and saute till the tomatoes become mushy. Then add the shrimps marinated in chilli powder and pepper powder. Cook it for 10 -15 minutes. Then add garam masala and ketchup to it. Mix well and cook for 5 minutes under low flame. Add grated cheese to it. Garnish with coriander leaves. Pasta is ready!!!😋😋😋