Portobello "Philly Cheese Steak" Sandwich

Why I Love This Recipe
I found this recipe in an old copy of Eating Well magazine. It is delicious! My husband and I are not vegetarians, but this recipe is filling and healthy. Had it with homemade baked "fries." Wonderful!
NUTRITION INFORMATION: Per serving: 268 calories; 10 g fat (4 g sat, 4 g mono); 15 mg cholesterol; 35 g carbohydrate; 13 g protein; 7 g fiber; 561 mg sodium; 707 mg potassium.
Nutrition bonus: Vitamin C (140% daily value), Selenium (49% dv), Vitamin A (30% dv), Calcium (25% dv), Potassium (20% dv), Magnesium (16% dv).
Ingredients You'll Need
2 teaspoons extra-virgin olive oil
1 medium onion, sliced
4 large portobello mushrooms, stems and gills removed (see Tip), sliced
1 large red bell pepper, thinly sliced
2 tablespoons minced fresh oregano or 2 teaspoons dried
1/2 teaspoon freshly ground pepper
1 tablespoon all-purpose flour
1/4 cup vegetable broth or reduced-sodium chicken broth
1 tablespoon reduced-sodium soy sauce
3 ounces thinly sliced reduced-fat provolone cheese
4 whole-wheat buns, split and toasted
Directions
1. Heat oil in a large nonstick skillet over medium-high heat. Add onion and cook, stirring often, until soft and beginning to brown, 2 to 3 minutes. Add mushrooms, bell pepper, oregano and pepper and cook, stirring often, until the vegetables are wilted and soft, about 7 minutes.
2. Reduce heat to low; sprinkle the vegetables with flour and stir to coat. Stir in broth and soy sauce; bring to a simmer. Remove from the heat, lay cheese slices on top of the vegetables, cover and let stand until melted, 1 to 2 minutes.
3. Divide the mixture into 4 portions with a spatula, leaving the melted cheese layer on top. Scoop a portion onto each toasted bun and serve immediately.
NUTRITION INFORMATION: Per serving: 268 calories; 10 g fat (4 g sat, 4 g mono); 15 mg cholesterol; 35 g carbohydrate; 13 g protein; 7 g fiber; 561 mg sodium; 707 mg potassium.
Nutrition bonus: Vitamin C (140% daily value), Selenium (49% dv), Vitamin A (30% dv), Calcium (25% dv), Potassium (20% dv), Magnesium (16% dv).