In a medium sized mixing bowl, combine mayonnaise, vinegar, extra virgin olive oil, dijon mustard, oregano, sea salt, and black pepper.
Stir in crushed garlic, diced cucumbers, diced red onion, shredded romaine lettuce, and chopped black olives. Set aside in the refrigerator until the sandwiches are assembled.
Preheat the broiler on high.
Slice the italian rolls in half and lay each piece out onto a baking sheet.
Place 4 slices of turkey on each sandwich.
Top the turkey with slices of gruyere cheese and tomato slices.
Broil the sandwiches open faced until the cheese is melted and the tops of the rolls begin to toast.
Remove the sheet pan from the oven.
Place one strip of bacon onto each sandwich.
Layer avocado slices over the bacon.
Generously top each sandwich with the creamy cucumber slaw.
Put the top of the roll onto the sandwich and slice in half.
Serve immediately.