Preheat oven to 350°F.
Steam cauliflower just until tender; drain. Melt butter in a medium size saucepan over medium heat.
In a jar with a lid combine.
flour, red pepper, salt, pepper, garlic and milk; shake until blended.
Slowly add to butter or margarine in saucepan, stirring constantly until smooth. Add cheese and continue stirring until smooth and thickened.
Add more milk to make a roux.
(Thick sauce but not paste).
Stir in chilies.
Arrange cauliflower in a 2 quart baking dish; pour sauce over cauliflower, then sprinkle with bread crumbs if desired.
Bake 5 to 10 min or until bubbling.