Caramelize the sliced onions in a cast-iron skillet over medium heat until they turn golden brown and sweet.
1
Place the blanched cauliflower florets on a baking tray and season with sea salt and black pepper.
2
Layer the fried bacon pieces and caramelized onions over the cauliflower.
3
Sprinkle the cheddar and mozzarella cheese over the cauliflower mixture. Distribute small pieces of butter over the cheese.
4
Bake in the oven at 350°F (175°C) for approximately 30 minutes until the cheese is melted and the top turns golden brown.
5