Portobello Mushroom Burger - Common Threads

Ingredients

• 4 large portobello mushroom
• 1 clove garlic
• 1 avocado (optional)
• 1 Tbsp red wine vinegar
• Salt and pepper to taste
• 1 Tbsp olive oil
• 4 – 1/2 oz slices cheddar cheese, or Gruyere cheese
• 4 oz baby Spinach, or arugula
• 4 whole wheat buns
• 1 recipe Quick Pickled Red Onion (optional)
• 2 oz hummus (optional)