If using the oven method, preheat the oven to 450F or 425F convection or you can just make these in a skillet.
In a small bowl, mix together the yogurt, cranberry sauce, mustard, and lemon.
Brush the outside of each slice of bread with oil or spread on a thin layer of butter. Flip the bread over, oiled side down.
In a medium bowl, add the cheese, turkey, and greens or veggies and toss to combine.
Divide the mixture between the two slices of bread and top each slice with the other corresponding slice to form your sandwich.
You can cook these in a covered skillet until crispy and golden on both sides or use the oven method I’ll describe below (see note).
Place the sandwiches on an unlined baking sheet (no parchment paper). Place a large heavy oven-proof skillet on top to press the sandwiches down. If you’re making multiple sandwiches, you can place a baking sheet on top of the sandwiches and place the heavy skillet on top of that to weigh it down.
Bake for 10-12 minutes or until crispy. Serve with dipping sauce.