4 portobello mushroom burger with and slaw Recipes

portobello mushroom caps, white balsamic vinegar, olive oil, salt, whole wheat hamburger buns, carrot-cabbage slaw

onion, chopped, portobello mushrooms, trimmed and quartered, olive oil, divided, ground buffalo, celery ribs, granny smith apple, cored (left unpeeled ), mayonnaise, cider vinegar, olive oil, whole-grain mustard, sugar

soy sauce, mirin* (sweet japanese rice wine ) or medium-dry sherry, rice vinegar, minced peeled fresh gingerroot, sugar, fresh portobello mushrooms (about 1/4 lb each), stems trimmed flush with caps and reserved for another use, mayonnaise, rice vinegar, asian sesame oil, honey, shredded napa cabbage, shredded carrot, scallions, chopped fine, vegetable oil for brushing mushroom caps, sesame-seed hamburger buns, split and toasted lightly