It's all about the gravy, baby!
Switch on the broiler. Line a small baking sheet with foil.
In a small skillet, heat about 1 tbsp. oil, one turn of the pan, over medium. Add 2 tbsp. butter and the crushed garlic and swirl until the garlic is aromatic, a minute or so. Toast the bread; brush with the garlic butter. Top with the parsley and Parm. Broil on the baking sheet until the cheese melts, 2 to 3 minutes.
In another large skillet, heat the remaining 2 tbsp. oil, two turns of the pan, over medium. Add the chopped garlic and stir until aromatic, a minute or so. Toss in the spinach until wilted, about 1 minute. Add the nutmeg; season. Squeeze the lemon over the spinach.
Top the garlic toasts with the spinach, the turkey and gravy, and the tomato; season. Top with the provolone. Broil until bubbly and browned, about 3 minutes.