Roast Beef & Muenster on a Kaiser Bun

Ingredients

KAISER BUN (UNBLEACHED ENRICHED FLOUR [WHEAT FLOUR, MALTED BARLEY FLOUR, NIACIN, REDUCED IRON, THIAMINE, MONONITRATE, RIBOFLAVIN, FOLIC ACID], WATER, YEAST, GRANULATED SUGAR, FULLY REFINED SOYBEAN OIL, WHEAT GLUTEN, SALT, CALCIUM PROPIONATE [TO RETAIN FRESHNESS], DOUGH IMPROVER [MALTED WHEAT FLOUR, ENZYMES AND 2% OR LESS OF ASCORBIC ACID], ENZYMES, YELLOW CORN FLOUR, TURMERIC AND ANNATTO EXTRACTS [COLOR]), ROAST BEEF (RUBBED WITH SALT, SUGAR, DEXTROSE, CARAMEL COLOR, GARLIC POWDER, ONION POWDER, SPICES. BEEF, WATER, ISOLATED SOY PROTEIN, SALT, SODIUM PHOSPHATES, SUGAR, FLAVORING, SEASONING [SALT, FLAVORING]), MUENSTER CHEESE PASTEURIZED MILK, CHEESE CULTURES, SALT, ENZYMES AND ANNATTO COLOR), ROMAINE LETTUCE.