Preheat oven to broil. Heat a skillet/pan to medium heat.

Add the butter, onion and garlic. Cook until onions turn golden, about 5 minutes.

Add the spinach and let it cook until it shrinks. Stir. Add the cream, salt, pepper, nutmeg and flour. Stir until mixed well.

Let cook until sauce thickens, about 5 mins. Stir occasionally.

With a spatula, make a little space to place the egg. After the egg is comfortable in its spot, sprinkle the mozzarella.

Broil for 3 mins for a soft yolk, or until egg is cooked to your preference. If your pan is not oven-proof, cover and cook on medium-low heat for 3 minutes for a soft yolk, or until egg is cooked to your preference. Serve with fresh bread for dipping.