Thinly slice onions and add water to a small bowl. This will mellow them out.
Make caesar dressing by combining all ingredients except for the olive oil in a bowl. Slowly whisk in olive oil. Season to taste. Add in chopped romaine and mix until creamy and combined.
Add a few slices of bacon to a pan and cook on medium heat until desired crispiness. Transfer to a paper towel lined plate.
Add shredded mozzarella to ciabatta and broil for a few min until brown and bubbly. Add turkey, tomato, bacon and romaine slaw. Wrap, slice and enjoy!