Chipotle Chicken Sandwich

Ingredients (10)

• 4 large chicken breasts, halved and pounded to an even thickness
• 1/3 Cup olive oil
• 1 lime, juice only
• 2 cloves garlic, minced
• 2-3 chipotle peppers, de-seeded and minced
• 1 Tablespoon Adobo sauce, from chipotle container
• 8 hamburger buns
• 2 avocados, 1/4 per sandwich
• Lettuce
• Spicy Mayo (optional)