Spicy Chipotle Grilled Chicken Sandwhich

1. I used leftover grilled chicken breasts so that saved me a step!
2. Heat a pan over medium heat
3. Add bacon and cook for a few minutes on each side until crispy. Save the grease in the pan
4. While the bacon cooks, blend the chipotle aioli ingredients
5. After the bacon is done, add the sliced onion to the pan and caramelize for 5-7 minutes, stirring occasionally
6. Preheat oven to 375F
7. Assemble the sandwiches. On one side, add tomato + mozzarella. On the other, add grilled chicken + bacon + onions. Toast until the cheese is melted
8. Then add a few slices of romaine lettuce, 1/4 avocado, and a drizzle of Chipotle aioli to each sandwich
9. Combine and enjoy!
10. This makes 4 sandwiches