Add your vegetable oil to the pan on a high heat for 1 minute and then add the onion and cook for 3-4 minutes, stirring frequently.
Add the garlic and ginger paste and cook for 30 seconds.
Add salt, coriander powder, cumin powder, chilli powder, turmeric powder and paprika powder and cook for 30 seconds. Feel free to add 50ml of the chicken stock to ensure the spices don’t burn.
Add the tomato concentrate mix and turn the heat up high. Cook for 2-3 minutes and keep stirring frequently.
Add 200ml of the chicken stock and cook on a high heat for 3-4 minutes.
Repeat previous with another 200ml of chicken stock and cook until the curry has absorbed most of the stock and isn't watery
Add the cooked lentils, pre cooked chicken tikka, pineapple pieces, mango chutney, sugar, pineapple juice and lime juice. Turn to a medium heat and cook for 5-6 minutes.
Garnish with kasuri methi, garam masala, freshly chopped coriander and then serve.