1/4cup whole wheat breadcrumbsor gluten-free if needed
Cook cauliflower rice with oil until defrosted and tender in a large oven-safe skillet (like a cast iron) on medium-high heat. Meanwhile, mix cream cheese, sour cream, milk, garlic, salt, and pepper into a sauce.
Add cream sauce and 3/4 cup cheddar cheese to cauliflower rice. Keep stirring until everything is a creamy smooth consistency. Turn oven onto broil.
Stir in green onions. Turn off the heat and top with the remaining 1/4 cup sharp cheddar cheese and breadcrumbs.
Broil for 3-4 minutes, or until cheese is melted and the top is golden brown.