Harissa Spice Store - Simple and rich chicken curry

Ingredients

• 4 chicken fillets
• 1 onion
• 400 g tomato passata (or chopped tomatoes)
• 1 tbsp tomato puree
• 400 g coconut milk (1 can)
• 2 tsp garam masala
• 1 tsp fresh ginger or 2 tsp ginger paste
• 1 tsp turmeric
• 1 tsp cayenne pepper
• ¼ tsp ground black peppercorn
• 2 garlic cloves
• salt
• sugar
• olive oil