Preheat panini grill (or pan) to medium temperature. In a small bowl, microwave the cream cheese for 20-30 seconds to soften. Mix artichokes, spinach, and asiago (or parmesan cheese) into cream cheese.
Spread spinach artichoke mix on bread (or wrap) and layer on the turkey and tomato slices (and sautéed onions, if desired). Top with other piece of bread (or fold wrap in half like a taco shell).
Place sandwich in preheated grill and press lightly. Grill 2-3 minutes, or until the cheese begins to melt and bread is toasted. Serve warm and enjoy!