Slow Cooker Chicken Tikka Masala

Ingredients

• 1 brown onion (diced)
• 1 tablespoon ginger (chopped)
• 1 tablespoon garlic (chopped)
• 700 g chicken thighs (chopped into 4 cm pieces)
• 1 tablespoon ground coriander
• 1 tablespoon ground turmeric
• 1 tablespoon garam masala
• 2 tablespoons tomato paste
• 400 g canned crushed tomatoes
• 3 tablespoons tikka masala paste
• 2 cups frozen green beans
• 2–3 tablespoons greek yoghurt
• brown or white rice (to serve)