A classic French Dip Sandwich is one of my favorite comfort foods. The combination of slow cooked roast beef, a rich au jus, and crunchy toasted bread is a mouthwatering meal all by itself! This simple slow cooker recipe is a great addition to your weeknight menu.
Season beef with salt, pepper, and oregano. Turn on pressure cooker to SAUTE HIGH and heat oil. Place seasoned beef in pot and sear for 5 minutes. Flip and sear for an additional 5 minutes. Remove from pot and set aside.
Add onions to the pot and saute until softened, about 3 minutes. Add in garlic, and cook an additional 30 seconds.
Place onions and remaining ingredients into Instant pot. Stir. Add beef back to pot, nestling in the liquid. Place on lid and seal valve. Cook on HIGH pressure 45 minutes then allow pressure to naturally release 25 minutes. Let out any remaining pressure.
Proceed with crockpot directions above.
For sandwiches: Preheat oven to 375°F. Open up sliced hoagie buns and butter the insides. Place opened buns on a baking sheet and toast for 5 minutes. Remove from oven, add a slice of provolone cheese to each roll, and bake for 1 minute longer. Divide beef between buns and serve immediately serving with au jus for dipping.