Restaurant Style Butter Chicken

Name: Restaurant Style Butter Chicken
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: Indian
Ingredients: 2 tablespoon oil; 1 large red (or brown) onion, chopped; ½ teaspoon minced ginger; ½ teaspoon minced garlic; 2 dried bay leaves; 1 teaspoon ground cumin; 2 teaspoon garam masala; 1 teaspoon red chili powder; 2 tablespoon butter; Juice from 1 small lemon; 2 tablespoon tomato paste; ½ cup cream; 1 tablespoon natural yogurt; ¼ cup milk; 500g boneless chicken, cut into cubes (I used thigh fillet); ¼ teaspoon ground fenugreek; 6-8 cashew nuts, ground (optional); Coriander leaves, to garnish; Naan, or basmati rice, to serve