Tikka Masala Spiced Whole Chicken

Ingredients

• 2 tbsp Greek yoghurt
• 4 tbsp tikka masala curry paste
• 2 kg whole chicken
• 2 cloves garlic
• 1 large onion, quartered
• 2cm piece of ginger, peeled
• 2 tbsp olive oil
• 1 tsp ground coriander
• 1 tsp ground cumin
• 600g chopped tomatoes (fresh or tinned)
• 300ml chicken stock, heated
• 500g washed potatoes
• 200g baby spinach