Serve immediately for the juiciest sandwiches.
Store leftover beef in an airtight container in the fridge for up to 3 days; reheat gently with a splash of broth to retain moisture.
Variations
Spicy Kick: Add extra pepperoncini or a few dashes of hot sauce.
Cheesy Delight: Melt provolone or mozzarella under the broiler before serving.
Slow Cooker Version: Cook beef on low for 8 hours with the same ingredients if you don’t have an Instant Pot.
