Here are the ingredients of the standard Garden Burger from their website.
Ingredients:
VEGETABLES (BUTTON MUSHROOMS, ONIONS, CRIMINI MUSHROOMS, PORTABELLA MUSHROOMS), COOKED BROWN RICE (BROWN RICE, WATER), ROLLED OATS, MOZZARELLA CHEESE (PASTEURIZED PART-SKIM MILK, CULTURES, SALT, ENZYMES), WATER, BULGUR WITH WATER FOR HYDRATION, PARSLEY, CHEDDAR CHEESE (PASTEURIZED MILK, SALT, ENZYMES, CULTURES, ANNATTO FOR COLOR), CONTAINS TWO PERCENT OR LESS OF YEAST EXTRACT, NATURAL FLAVOR, MODIFIED VEGETABLE GUM, SALT, MUSHROOM EXTRACT, GARLIC POWDER, AUTOLYZED YEAST EXTRACT, SPICES, CITRIC ACID, MALTED BARLEY, NATURAL BUTTER FLAVOR, WHEY, DEHYDRATED ONION, ANNATTO FOR COLOR, DEHYDRATED MUSHROOMS, GUAR GUM, NATURAL SMOKE FLAVOR, TURMERIC FOR COLOR, SOY LECITHIN.
Wow! That's an eye-opener! I ate a veggie burger once when we met someone at Denny's for lunch and it was the only vegetarian thing I could find on the menu -- certainly not vegan, is it? (this particular brand, anyway)
I want to try the large mushroom "burger" sometime -- is it a portabella that some people grill and eat like a burger?