Cheesy Masala Cauliflower Pithivier – Seema Pankhania

Ingredients

• ½ tbsp olive oil
• 2 large onions, finely sliced
• 1 tsp mustard seeds
• 1 tsp cumin seeds
• 2 tbsp apple cider vinegar
• 150g potatoes, peeled and diced
• 3 leeks, sliced
• 4 garlic cloves, sliced
• Large handful coriander
• 50g butter
• 1 tbsp plain flour
• 1–2 tsp chilli powder
• 1 tsp ground coriander
• 1 tsp ground cumin
• 1 tbsp grated garlic
• 1 tsp grated ginger
• 400ml milk
• 450g Cauliflower
• 150g cheddar cheese, grated
• 2 x 375g packs ready-rolled puff pastry
• 1 egg, beaten