Roasted Portobello Mushroom Veggie Sandwich | La Terra Fina

Ingredients

• 1/4 cup olive oil
• 1/4 cup balsamic vinegar
• 1 teaspoon Dijon mustard
• 1 teaspoon garlic, minced
• 1/2 teaspoon Kosher salt
• pinch ground pepper
• 1/2 yellow onion, sliced in rings
• 2 small or 1 large zucchini, sliced in sticks
• 4 portobello mushrooms, sliced
• 12 slices whole grain seedy bread
• 4 slices Muenster cheese
• 1 (10 oz.) container Spinach Artichoke Parmesan Dip; also try with any of our Classic or Greek Yogurt Dips