Toast bread slices gently on low setting in a toaster or toaster oven. Then spread out 4 slices of bread. Top each slice with a liberal amount of Dijon-mayonnaise.
Place two pieces each of sliced turkey breast on two of the pieces of bread, then top with brie cheese and place in toaster oven or hot oven at 350°F for 2 minutes to slightly melt the cheese.
Place dill pickles and baby spinach on top of the cheese for each and then top with other piece of bread.
Enjoy!