Preheat oven to 400°. Line a baking sheet with foil.
In a small bowl, stir together mayonnaise, chili sauce, relish, shallot, and vinegar. Spread onto one side of each bread slice. Top each with 2 slices turkey, kraut, spinach, and 1 slice cheese. Place on prepared pan.
Bake until cheese is melted and sandwich is heated through, about 5 minutes. Serve immediately.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/open-faced-turkey-reuben-recipe/