Creating Gordon Ramsay Chicken Tikka Masala is straightforward when you follow these easy steps:

1. Marinate the Chicken: In a bowl, mix the diced chicken with yogurt, garlic, ginger, and a pinch of salt. Let it marinate for at least 30 minutes, preferably overnight in the fridge.
2. Cook the Chicken: Heat 1 tablespoon of vegetable oil in a pan over medium heat. Add the marinated chicken and cook until golden brown. Remove and set aside.
3. Sauté Onions: In the same pan, add the remaining oil. Sauté the chopped onions until they are translucent.
4. Add Spices: Stir in the garam masala, ground cumin, ground coriander, turmeric, and chili powder. Cook for about 1 minute until fragrant.
5. Combine Tomatoes: Add the chopped tomatoes to the pan, stirring well. Cook until the mixture thickens.
6. Pour Cream/Coconut Milk: Add coconut milk or heavy cream, stirring to combine. Allow it to simmer for about 5 minutes, letting the flavors meld together.
7. Return Chicken: Add the cooked chicken back into the sauce. Simmer for another 10 minutes, allowing the chicken to absorb the flavors.
8. Adjust Seasoning: Taste the sauce and adjust salt and spices as needed.
9. Garnish and Serve: Remove from heat and garnish with fresh cilantro before serving.

Following these steps will ensure flavorful chicken tikka masala that would impress even the toughest diners.