Delicious Pot Roast sandwich on a wooden board.

Pot Roast Sandwich

Prep Time: 10 minutes
Cook Time: 8 hours
Total Time: 8 hours 10 minutes
Servings: 4 -6 hoagie sandwiches


  • 1 Beef Tri Tip 1.5 lbs
  • 1 Packet Mrs Dash Pot Roast Seasoning
  • 1 1/2 Tablespoons Butter unsalted
  • Hoagie Rolls
  • Butter for toasting

For the Gravy

  • 3/4 Cup Beef Drippings
  • 1 Cup Water
  • 2 Tablespoons Cornstarch
  • 1/4 Cup Cold Water
  • Salt and Pepper to taste

For the onions

  • 1 tablespoon butter
  • 1 Onion sliced


  • Place the beef in a slow cooker and sprinkle with the entire pot roast seasoning packet.
  • Add the butter on top, place the lid on and cook on low for 8 hours, flipping over halfway through and dumping the juices over the top to flavor the other side.

For the Onions

  • About 20 minutes before the beef is done, add the butter to a skillet and heat over medium heat until melted.
  • Add the onions, turn down to low and let the onions caramelize for about 20 minutes.

For the gravy

  • Once the beef is done, scoop out 3/4 cup of the juices and place in a sauce pan over medium heat.
  • Add the water and bring to a boil, whisking to break up any browned bits.
  • In a small bowl combine the cold water and corn starch.
  • Add 2 tablespoons of the hot liquid to the cornstarch mixture and then while whisking the drippings, slowly pour in the corn starch.
  • Whisk to combine, bring back to a boil and then turn down to a simmer for about 10 minutes or until thickened.

To assemble

  • Cut the hoagie open and butter each side of the bread.
  • Heat the oven to broil and lay the bread open so it can get browned. DO NOT WALK AWAY! I know you think you can run to change the laundry but the bread will burn. Talking from experience here.
  • Remove the bread from the oven.
  • Using tongs pick up chunks of the meat, it should fall apart, no cutting needed. Place on the bread, top with gravy and caramelized onions.
  • Enjoy!


Depending on the size of your tri tip your meat could be done around 6-7 hours, just keep checking on it. We tend to buy bigger pieces at Costco so we are almost always 8 hours.
Nutrition Facts
Pot Roast Sandwich
Amount Per Serving (1 g)
Calories 283
% Daily Value*
Cholesterol 100.9mg34%
Carbohydrates 4.9g2%
Fiber 0.5g2%
Sugar 0.9g1%
Protein 27.5g55%
* Percent Daily Values are based on a 2000 calorie diet.