Cut the chicken breast into 1-inch cubes and season with sea salt and black pepper.
Heat the ghee in a large skillet over medium-high heat.
Add the chicken to the skillet and sear until golden brown on all sides, then remove and set aside.
In the same skillet, add the diced onion, minced ginger, and garlic, sautéing until soft and fragrant.
Stir in the garam masala, turmeric, and cumin, allowing the spices to toast for 1 minute.
Pour in the tomato puree and simmer for 5 minutes on medium-low heat.
Whisk in the full-fat coconut milk until the sauce is smooth and creamy.
Return the chicken to the pan and simmer for another 5-7 minutes until cooked through.
While the chicken simmers, lightly sauté the cauliflower rice in a separate pan until tender.
Serve the chicken and sauce over the cauliflower rice and garnish with chopped fresh cilantro.