Lay the tortilla flat on a clean surface.
Mash the avocado directly onto the tortilla and spread it evenly.
Sprinkle a small pinch of salt and pepper over the avocado.
Layer the roasted turkey slices evenly across the center.
Add spinach or romaine on top of the turkey.
Place tomato slices and red onion evenly over the greens.
Spread a thin layer of mustard or Greek yogurt if using.
Fold the bottom edge up slightly, tuck in the sides, and roll tightly into a wrap.
Slice in half if desired and serve immediately.