Easy Chicken Tikka Masala

Ingredients

• 1.2 pounds chicken fillets
• ¾ cup plain yogurt (full fat)
• 2 tbsp tikka masala paste
• 1 tsp salt
• 1 tsp smoked paprika
• 1 tsp black pepper
• ½ tsp chili flakes
• 1 tbsp olive oil
• 2 tbsp unsalted butter (divided)
• 1 small yellow onion (finely chopped)
• 6 garlic cloves (minced)
• 1 tbsp grated ginger
• 1 tsp ground turmeric
• 1 tsp ground coriander
• 1 tsp ground cumin
• 1 tsp sugar
• ½ tsp salt
• 1 cup tomato purée
• 14 ounces unsweetened full fat coconut milk
• 1 tsp lime juice
• basmati rice
• red chili pepper
• chopped cilantro
• warm naan