Chicken Curry-Kerala Style

Here are the quantities for the ingredients for a chicken curry with 1 kg of chicken:
1. Oil - 2 tablespoon
2. Mustard - 1 teaspoon
3. Onion - 3 large, finely chopped
4. Green chilly - 2-3
5. Curry leaf - 1 sprig
6. Fennel - 1 teaspoon
7. Ginger-garlic paste - 2 tablespoons
8. Salt - to taste (approximately 1.5 teaspoons)
9. Tomato - 1 medium, finely chopped
10. Turmeric powder - 1/2 teaspoon
11. Coriander powder - 2 teaspoons
12. Chilly powder - 1.5 teaspoons
13. Garam masala - 1 teaspoon
14. Pepper powder - 1/2 teaspoon
15. Chicken - 1 kg, cut into pieces
16. Water - adjust based on desired consistency