For the ground beef filling, combine ground beef, onion, garlic, tomato paste, tomato, egg, chili flakes, oregano, basil, sage, pepper, and salt in a large mixing bowl until fulling incorporated. Set aside.
3. Step
Remove the whole stem from the cauliflower making sure to leave the head fully intact.
4. Step
Boil the cauliflower in a pot of water over high heat for 8-10 minutes or until fork-tender.
5. Step
Remove the cauliflower from the pot and place on parchment paper-lined baking sheet.
6. Step
Carefully remove any remaining stem making sure there is space for the filling.
7. Step
Fill the head of cauliflower with ground beef mixture making sure to press the filling into the head of cauliflower.
8. Step
Cover inverted head of cauliflower with aluminum foil and bake in preheated oven for 30 minutes, or until ground beef mixture is cooked through.
9. Step
Preheat oven to broil.
10. Step
For the bechamel, melt butter in a saucepan over medium heat.
11. Step
Mix in flour and stir until mixture lightly browns, about 2 minutes.
12. Step
Stir in the milk and allow mixture to thicken, about 5 minutes.
13. Step
Add in the Parmesan, salt, and pepper and mix until fully incorporated and has the consistency of a thick batter.
14. Step
Remove aluminum foil from stuffed cauliflower.
15. Step
Cover the cauliflower in bechamel sauce and a sprinkle of Parmesan cheese.
16. Step
Broil for 5 minutes or until bechamel lightly browns.
