Grilled Veggie-Portobello Mushroom Burgers
Ingredients:
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6 large portobello mushroom, stems removed
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1 eggplant, sliced into 1/2 inch rounds
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1 medium yellow squash, cut into 1/4-inch slices
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1 zucchini, cut into 1/4-inch slices
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1 (16 fl oz) bottle balsamic vinaigrette
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1 (4 ounce) package crumbled blue cheese
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6 hamburger buns, split and lightly toasted