4 frozen vegetable burgers
1 jar (4.5 oz) Green Giant® sliced mushrooms, drained
4 slices (about 1 oz each) reduced-fat Swiss cheese
1/4 cup fat-free mayonnaise
4 whole-grain hamburger buns
4 tomato slices
4 lettuce leaves
Ketchup and mustard, if desired

1.) Heat gas or charcoal grill. Place vegetable burger on grill over medium heat.

2.) Cover grill; cook 6 to 9 minutes, turning once, until thoroughly heated.

3.) Divide mushrooms evenly onto patties; top with cheese. Cover grill; cook 1 to 2 minutes longer or until cheese is melted.

4.) Spread 1 tablespoon mayonnaise on each bun. Serve patties in buns with tomatoes, lettuce, ketchup and mustard.

If you haven't had veggie burgers for a while, you're in for a treat! They come in many flavors, from Cajun-spiced to classic grilled. Choose your favorite version.

Team these burgers with classic picnic fare: Carrot and celery sticks, fresh-cut melon and lemonade.