Preheat oven to 400°F. Break the cauliflower into chunky pieces and steam until just tender. Put in the food processor with 2 Tbsp butter and process until smooth. Add salt & pepper to taste. Optional: Add cream 1 Tbsp at a time until smooth but still fairly thick. Set aside.

Heat oil in a skillet over medium-low heat. Add onion and sauté several minutes until soft. Add beef and cook for about 5 minutes, stirring to break up the meat so it browns evenly. Add peas, carrots and green beans and cook another five minutes.

Stir in the coconut flour. Add broth and herbs and reduce the heat to low and simmer, stirring occasionally, for about 5 minutes. Add salt and pepper to taste. Remove from skillet and put into a 9-inch pie pan. Spread the cauliflower over the top.

Scatter 2 Tbsp of butter cut into small pieces on top of the cauliflower. Bake 30–35 minutes.