"Multigrain bread" means that the bread is made from multiple types of grains, such as wheat, oats, barley, and corn, rather than just one type of grain like white bread. Full definition
The only thing I can think that would make this better is using a thick slice of multigrain bread in place of the crusty bread so I could rationalize this dish as semi healthy! (thepioneerwoman.com)
Lunch Market Lunch Box: Pack up 2 slices multigrain bread with 2 hard - boiled farm - fresh eggs, 6 steamed asparagus spears, and 1 ounce fresh Parmesan cheese. (health.com)
Black Forest Ham on multigrain bread with French whole grain mustard, jarlsberg cheese, lettuce, and tomato * (davisfamilyvineyards.com)