Grind together all the ingredients mentioned in marination section (except salt and lime juice) and make a thick paste.
Apply this to the chicken along with lime juice and salt and keep it aside for 2 hours for marination. You can marinate and keep it in freezer overnight too. Just thaw before cooking.
Heat oil in a pan.
Add onion and sauté till onion turns pinkish.
Add ginger-garlic paste and mix well.
Add slit green chillies.
Add chopped tomato and sauté till tomato turns mushy.
Add capsicum and cook till capsicum turns soft.
Next step is to add spice powders – add turmeric powder, red chilli powder, black pepper powder and garam masala and mix well.
Add tamarind paste and mix well.
Add Maggi cube and mix well. (This is optional)
Add marinated chicken pieces and mix.
Cook covered on low flame for 10 minutes.
Add 1 cup water and cook with lid covered for 25 minutes stirring occasionally.
Check if the chicken pieces are cooked. If needed add little water.
Add salt to taste.
Garnish with finely chopped coriander leaves.