Preheat grill or oven to 400 degrees. Wash chicken and pat dry. Drizzle both sides with olive oil, salt and pepper. Cook for about 5-7 min per side or until temp has reached 165 internally. Remove and slice into bite sized pieces.
Set oven to broil and add shredded cheese to ciabatta and broil until bubbly.
Make the dressing: Combine all dressing ingredients in a mason jar and shake until combined and smooth.
Slice avocado and assemble your sandwich by adding slices of chicken, avocado, tomato. Drizzle with vinaigrette and top with fresh arugula. Enjoy!
