Pastrami on Rye Recipe

Ingredients (4)

• 2 slices fresh (untoasted) Jewish rye bread
• Spicy brown or yellow mustard
• 8 ounces (227 g) high-quality (from a good Jewish delicatessen) or homemade fatty pastrami, sliced hot across the grain (see notes)
• Full- or half-sour pickles, for serving (optional)