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Mom’s Secret Casserole


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  • Author: 365 Days of Slow and Pressure Cooking
  • Prep Time: 25 minutes
  • Total Time: 25 minutes
  • Yield: 6 servings 1x

Description

Ground beef with vegetables in a rich gravy, topped with mashed potatoes and melty cheese…all made in your Instant Pot!


Ingredients

Scale
  • 1 pound lean ground beef
  • 2 Tbsp minced dehydrated onion
  • 4 ounces mushrooms, chopped
  • 2 Tbsp Worcestershire sauce
  • Kosher salt
  • Black pepper
  • 2 tsp garlic powder
  • Pinch of red pepper flakes
  • 1 Tbsp tomato paste
  • 1 cup beef broth
  • 3 carrots, peeled and sliced
  • 6 oz fresh green beans, ends trimmed and cut in half
  • 1 1/2 pounds red potatoes, cut into 1/2 inch cubes
  • 2 Tbsp butter
  • 1/2 cup milk
  • 1 (8 oz) can tomato sauce
  • 1/4 cup heavy cream
  • 1/4 cup potato flakes or 1 Tbsp cornstarch
  • 1/2 cup colby jack cheese

Instructions

  1. Turn Instant Pot to saute setting. When display says HOT add in the beef and break it up. Add in the onions, mushrooms, Worcestershire, 1 tsp of kosher salt, 1 tsp of black pepper, garlic powder and red pepper flakes. Brown for about 5 minutes.
  2. Stir in the tomato paste and the beef broth. Scrape bottom of pot so that nothing is sticking. Turn off the pot.
  3. Layer the carrots and green beans on top. 
  4. Add the potatoes into a steamer basket and place the steamer basket into the pot on top of the green beans. 
  5. Cover Instant Pot and secure the lid. Make sure valve is set to sealing. Set the manual/pressure cook button to 4 minutes. When time is up move the valve to venting and remove the lid. 
  6. Remove the steamer basket and dump the potatoes into a mixing bowl. Mash the potatoes. Stir in the butter, milk, 1 tsp kosher salt and 1 tsp of pepper. Set aside. 
  7. Stir the tomato sauce and heavy cream into the Instant Pot. If you’d like to thicken the mixture you can do that by stirring in the potato flakes or make a cornstarch slurry and stir it into the pot on the saute setting. 
  8. If you have an air fryer lid: Spoon the mashed potatoes over the top of beef mixture and smooth with a rubber scraper. Place air fryer lid on top and bake at 350 for 8 minutes. Sprinkle the cheese on top and bake for 2 more minutes. If you don’t have an air fryer lid: Spread the beef mixture into a baking dish. Spoon the mashed potatoes over the top of the beef and smooth with a rubber scraper. Bake in the oven at 350 degrees for 20 minutes. Top with the cheese and bake for 5 more minutes. 
  9. Serve and enjoy!
  • Category: Beef
  • Method: Instant Pot/Air fryer lid