Cashew Nut Paella

Name: Cashew Nut Paella
Ingredients: large pinch of saffron strands; 750ml hot vegetable stock; 2 tbsp olive oil; 1 leek, chopped; 1 onion, chopped; 2 garlic cloves, crushed; 1 red pepper, deseeded and chopped; 1 carrot, chopped; 250g paella rice; 150ml dry white wine; 115g chestnut mushrooms, sliced; 115g roasted, unsalted cashew nuts; salt and freshly ground; black pepper; 115g fresh shelled or frozen peas; 11⁄2 tbsp chopped thyme; 4 tomatoes, quartered; 1⁄2 tsp smoked paprika; sprig of flat-leaf parsley, to garnish; lemon wedges, to garnish