Saag aloo with roasted gobi curry

INGREDIENTS

• ½ head white cauliflower
• ½ head romanesco cauliflower
• 2-3 tbsp olive oil
• and freshly ground saltblack pepper
• 55ml/2fl oz gheevegetable oil
• 1 onion
• 2cm/1in piece fresh root ginger
• 1 tsp black mustard seeds
• 5 fresh or dried curry leaves
• ½ tsp ground turmeric
• ½ tsp fenugreek
• 2 green chillies
• ½ tsp chilli powder
• 3 potatoes
• 450g/1lb baby spinach
• 250g/8oz tomatoes
• ½ tsp salt
• ½ tsp sugar
• 55ml/2fl oz water
• squeeze lemon juice
• steamed basmati rice