Heat oven to 400 F;
Place broccoli in boiling water and cook for about 5 minutes, strain through a colander;
In a pan melt the butter, add flour and whisk until combined;
Cook it for about 5-6 minutes;
In the meantime, heat up the milk and add 1 cup at the time;
Stir it constantly to avoid any lumps;
Cook for about 10 minutes to make sure that all raw flour taste is gone;
Take off the heat;
Season with salt, pepper, and a pinch of nutmeg;
Add 1 cup of cheese and stir to combine;
Divide broccoli between 2 ramekins;
Spoon the sauce on top of the broccoli;
Add more cheese and black pepper;
Place ramekins on a baking sheet and put into the oven;
Bake for 15 minutes or until the cheese is golden brown and bubbly.