Preheat the oven to 380F.

Chop the fennel bulbs into small wedges or slices, whichever you prefer.

Place them in a microwave-safe bowl with the water, then cover and microwave for 5 minutes on full power. Drain the fennel and transfer to a baking dish.

Mix together the heavy cream, garlic, salt, and black pepper. Add the green onions and pour everything over the fennel. Sprinkle some grated Parmesan over the top of everything.

Bake in a preheated oven for 12-15 minutes until the top is golden brown.