Bring a pot of water to a boil and preheat oven to 375 °F (191 °C)
Chop cauliflower head into florets and add to boiling water. Boil for 5-7 minutes to soften but do not overcook the cauliflower.
1 large cauliflower head
Place cauliflower into an oven-safe casserole dish.
Chop the green onion and separate the white part from the green one. Mince garlic cloves.
1 green onion, 2 garlic cloves
Add olive oil to a saucepan, heat it on the stove over medium heat.
2 tablespoons olive oil
Add minced garlic and the white part of the green onion, stir for 2 minutes until fragrant.
Add the heavy cream, bring it to boil, stirring continuously. After boiling point, remove from heat. Stir in salt and pepper. Pour the cream over the cauliflower florets.
1 ½ cup heavy cream, 1 teaspoon kosher salt, ½ tsp ground pepper
Cover the cauliflower with cheddar cheese.
1 ½ cup cheddar cheese
Bake for 20 minutes or until fork-tender and golden.
Serve immediately, sprinkle the green part of the onion on top.
Notes
Store leftovers in an airtight container in the fridge for up to 5 days.