I found this while looking for cauliflower &
cheese recipes. It goes well on other things too.
What you need:
2 tbsp of butter
1 cup of milk
2 tbsp of
1/2 tsp of salt
1 cup of shredded cheddar cheese
Melt the butter over medium heat in a pan. Add the
milk, salt, and pepper. Sprinkle in the flour
so it doesn't form globs. Mix well and cook until it's
smooth and thick. Add the cheese and stir until that
melts. Pour the sauce over cauliflower, broccoli, or
whatever else you like.