Step 1

Preheat oven to 350°.

Step 2

Heat oil in a skillet on the stove and cook meat, onion, celery, and garlic. Stir in tomato paste, and season with salt & pepper to taste.

Step 3

If not using an oven-safe skillet, transfer the meat mixture to a medium-sized casserole dish.

Step 4

Heat up frozen cauliflower rice in the microwave according to package instructions, and drain any excess water.

Step 5

Place cauliflower in a food processor (or blender). Add in cheese, cream cheese, heavy cream, butter, and oregano. Process until the mixture has a "mashed potato" consistency.

Step 6

Spread mixture on top of meat evenly.

Step 7

Place in 350° oven for about 30 minutes, until top is golden brown.

Step 8

Cut and serve warm.