Best Chicken Sandwich

Step 1 -Preheat the grill to medium heat.

Step 2 -In a small bowl, mix the basil, the cilantro, the chives, the mayonnaise, the chili powder, the salt, and the pepper.

Step 3 -Taste the chili-herb mayonnaise for seasoning, and adjust with more of the salt and the pepper as needed.

Step 4 -Brush the chicken and the bell peppers with the extra olive oil and season them with the salt and the pepper.

Step 5 -Add the chicken and the bell peppers to the preheated grill and cook, turning once, until the peppers begin to char and the chicken is cooked through at 165 degrees F internally, about 4 minutes on each side.

Step 6 -Transfer the chicken and the bell peppers to a plate.

Step 7 -In a small skillet, add the remaining 1/3 cup of the olive oil and heat it over medium-low heat.

Step 8 -Add the onions and stir until they begin to brown and soften, about 10 minutes.

Step 9 -Preheat a skillet over low heat.

Step 10 -Spread the chili-herb mayo on 4 slices of the sourdough bread.

Step 11 -Layer the caramelized onions, the bell peppers, the avocado, the grilled chicken, and the Pepper Jack cheese.

Step 12 -Cover the sandwiches with the remaining bread slices.

Step 13 -Brush the sandwiches with the extra olive oil.

Step 14 -Place the sandwiches on the preheated skillet and toast until crunchy and golden-brown on one side, about 5-7 minutes.

Step 15 -Flip and cook until the cheese melts, about 2-3 minutes.

Step 16 -Slice the sandwiches in half.

Step 17 -Serve.