Preheat oven to 350F. Prepare a casserole dish by spraying it with coconut oil. Set aside.
In a skillet, cook ground beef over medium heat. While it is browning, add garlic powder and onion powder.
While beef is cooking, cut cauliflower in small florets and steam for 6 - 8 minutes, until tender on the outside and still crisp in the middle.
When ground beef is cooked, add to prepared casserole dish. In the same skillet, melt butter over medium heat. Add flour and whisk together. Slowly add the nut milk and stir until mixture comes to a boil and begins to thicken.
Remove sauce from heat and stir in 1 cup of shredded cheese until melted. Sprinkle with salt and pepper to taste.
Add cauliflower and cheese sauce to the casserole dish and stir to combine everything.
Sprinkle with remaining cheese and bake for 20 minutes, until cheese is melted and bubbly.
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