- Preheat your oven to 200°C/400°F/gas 6. 
- Arrange your oven shelves so the roasting tray can sit at the bottom. 
- The chicken will go directly above it on the bars of the shelf. 
- Pat the chicken dry with a paper towel. 
- Score the legs with a sharp knife. 
- Poke the lemon with a few holes and place it inside the chicken’s cavity. 
- In a deep bowl, mix tomato paste, ginger garlic paste, ground cumin, ground turmeric, ground coriander, garam masala, red chilli powder, lemon juice, and yogurt. 
- Rub the paste evenly all over the chicken. 
- Ensure it’s well-coated. 
- Place a large roasting tray at the bottom of the oven, lined with kitchen foil. 
- Position the chicken directly on the oven shelf above the tray. 
- This allows the juices to drip into the tray below. 
- Roast the chicken for 1 hour and 20 minutes or until the chicken is golden and cooked through. 
- Rest the chicken for 10 minutes before carving.