Vegetarian BBQ Hits - Spafinder

Ingredients

• 4 portobello mushroom caps
• ¼ cup balsamic vinegar
• 2 tablespoons olive oil
• 1 tablespoon minced garlic
• 1 teaspoon dried basil
• 1 teaspoon dried oregano
• salt and pepper to taste
• 4 (1 ounce) slices provolone cheese
• ⅓ cup walnuts
• 1 garlic clove, finely grated
• 2 tablespoons fresh lemon juice
• 5 tablespoons olive oil, divided
• 2 large leeks, white and pale-green parts only, halved lengthwise with some root attached
• 2 large zucchini (about 1 lb.), halved lengthwise
• ½ cup (lightly packed) fresh flat-leaf parsley leaves
• Kosher salt and freshly ground black pepper
• Corn
• Oil
• Butter
• Salt and Pepper