Cut the chicken breast into bite-sized cubes and season evenly with sea salt and black pepper.
Melt 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 the chicken and set aside.
In the same skillet, add the minced ginger and garlic, sautéing for 1 minute until fragrant.
Stir in the garam masala, turmeric, and cumin, allowing the spices to toast for 30 seconds.
Pour in the tomato puree and coconut milk, stirring to combine and scraping up any browned bits from the pan.
Return the chicken to the skillet, reduce heat to low, and simmer for 8-10 minutes until the sauce has thickened.
While the chicken simmers, steam or lightly sauté the cauliflower rice in a separate pan until tender.
Serve the creamy butter chicken over the warm cauliflower rice.