Question: Mornay sauce includes what type of hard yellow cheese?
Sentence (from "Bagel toast"): While the bagel is round with a hole in the center, it is unlike the typical American bagel in that it is made from a different dough with sesame seeds. Bagel toast is generally filled with tzfatit, feta, white, or yellow cheese, green olives, corn, tomatoes, onions, dressing, and pizza sauce, or a spicy sauce.
Relevant evidence: No