Creating Authentic Homemade Chicken Tikka Masala can be straightforward if you follow these steps:

1. Marinate the Chicken: In a bowl, mix the yogurt, ginger-garlic paste, spices, salt, and lemon juice. Add the chicken pieces, ensuring they are well coated. Cover and marinate in the refrigerator for at least 1 hour or overnight for best flavor.

2. Cook the Chicken: Preheat your grill or oven to 400°F (200°C). Arrange the marinated chicken on skewers or a baking sheet. Grill or bake for 15-20 minutes until fully cooked, slightly charred, and tender.

3. Prepare the Sauce: In a large pan, heat oil over medium heat. Add the chopped onion and sauté until golden brown and softened.

4. Add Ginger-Garlic: Stir in the ginger-garlic paste and cook for another minute until fragrant.

5. Mix in Tomatoes: Pour in the crushed tomatoes, followed by the spices (garam masala, cumin, coriander, and chili powder). Cook for 5-7 minutes, allowing the mixture to thicken slightly.

6. Creamy Texture: Reduce the heat and stir in the heavy cream or coconut milk. Allow it to simmer and blend flavors for 5 minutes.

7. Combine and Simmer: Add the grilled chicken to the sauce. Mix well to coat the chicken in the creamy sauce. Simmer on low heat for another 10-15 minutes.

8. Final Touches: Adjust the seasoning with salt and additional spices according to taste.

9. Garnish: Remove from heat and garnish with fresh cilantro before serving.

10. Optional Step: For extra smokiness, you can finish the dish by adding a few drops of liquid smoke.

These steps will guide you in creating this incredible Chicken Tikka Masala without hassle.