Mix in a bowl the mayo, parmesan, artichokes, garlic, spinach and salt.
Spread into a small casserole dish and bake 15 mins at 400 degrees.
Heat a large frying pan (I used a 17 inch cast iron) and melt 2 T. butter or olive oil (or a smaller pan, use 1 T.)
Lay down 3 tortillas and top each with some shredded cheese.
Spread spinach artichoke dip over the cheese and grilled shrimp if using. Top with another tortilla.
Cook until bottom is golden then flip carefully and pan fry the second side.
Let sit a few minutes before cutting into quesadilla pieces.