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" Melt butter over medium heat in large skillet. Add bell pepper, cook 4 minutes. Stir in mushrooms and garlic, cook 6 minutes or until pepper is tender and liquid from mushrooms evaporates. Season with salt and pepper to taste. Meanwhile, spread bread with mustard, mayonnaise, and/or horseradish sauce to taste. Layer lettuce, tomato, and onion, if desired, over bottom half of loaf. Top with mushroom mixture, cheese, and avocado. Cut crosswise into fourths and serve.Serving size is 397 grams. Each serving: 7.2 g monounsaturated fat, 1.8 g polyunsaturated fat, 234 RE vitamin A, 52 mg vitamin C, 246 mg calcium, and 3 mg iron."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.delish.com/cooking/recipe-ideas/recipes/a12511/portobello-provolone-sandwiches-recipe-sgt0710/?src=shelter_footer>