Pimped rice piri piri

Name: Pimped rice piri piri
Prep time: 20 min
Cook time: 1 h 15 min
Total time: 1 h 35 min
Yield: Serves: 4
Ingredients: 1 litre/35 fl oz/4⅓ cups chicken stock; 1 tbsp tomato purée/paste; a few coriander/cilantro leaves; 1 tbsp sweet smoked paprika; 2 red peppers, deseeded and sliced; 1 large onion, sliced; 3 garlic cloves, chopped; 2 yellow peppers, deseeded and sliced; ½ tsp dried oregano; 3½ tbsp red wine vinegar; salt and freshly ground black pepper; 4 skinless, boneless chicken breasts; 3 tbsp olive oil; 2 tomatoes, chopped; 4–8 red chillies, sliced (use less or more according to taste); 280 g/10 oz/heaped 1½ cups long-grain white rice, rinsed and drained; 1 tsp dried thyme