Beef Quesadillas with Chilli Salsa

Ingredients

• 8 soft flour tortillas
• 2 tbsp olive oil, plus extra for brushing
• 1 large onion, finely chopped
• 450g (1lb) lean minced beef
• 1 tsp sweet smoked paprika
• ½ tsp each ground cumin and coriander
• 2 tsp tomato puree
• 6 tbsp beef stock
• 150g (5oz) Cheddar cheese, grated
• 4 spring onions, finely chopped
• about 120ml (4fl oz) soured cream
• 225g (8oz) ripe vine tomatoes, seeded and diced
• 1 small red onion, diced
• 2 tbsp chopped fresh coriander, plus extra leaves to garnish
• 1 mild red chilli, seeded and finely chopped
• juice of 1/2 lime
• 2 tbsp extra-virgin olive oil
• salt
• freshly ground black pepper