Vegetarian Ciabatta Sandwich with Roasted Garlic Sauce

Ingredients

• 1 small garlic bulb
• 1 tsp olive oil
• 1/2 cup mayo
• 1 tbsp lemon juice
• 1 zucchini, sliced
• 1 red bell pepper, sliced
• 1 portobello mushroom, sliced
• 1 yellow onion, sliced
• 2 tbsp olive oil
• 1 tsp salt
• 6 oz mozzarella
• handful of arugula or spinach
• 1 ciabatta loaf