Cut the flank steak into 3 or 4 equal pieces or enough pieces so it can fit comfortably into the Instant Pot. Season all over the pieces with 1 ½ tsp kosher salt and ½ tsp ground pepper.
Turn the Instant Pot to ‘saute’ function and add 2 tbsp olive oil.
When the oil is hot, sear the flank steak (you may need to do this in 2 batches so you don’t overcrowd the Instant Pot) until nicely browned on each side, about 3-4 minutes per side. Move the seared pieces to a clean plate or bowl.
Once all of the meat has been seared and moved to a plate or bowl, add the onion and cook, stirring occasionally, until the onion is softened, about 4-5 minutes.
Add the minced garlic, dried oregano, dried basil, garlic powder, onion powder, ground cinnamon and ground clove, stir and cook 1-2 minutes until fragrant.
Stir in the beef broth and lemon juice, scraping the bottom of the Instant Pot for any browned bits.
Click ‘cancel’ to turn off the ‘saute’ function.
Nestle the seared beef into the onion mixture in the Instant Pot. Close the lid on the Instant Pot and make sure the steam release vent is closed. Press the ‘pressure cook’ (or manual) button and set for 40 minutes.
After 40 minutes, allow the pot to do a natural steam release for 5 minutes. Then, carefully open the valve to vent manually to release the rest of the steam - this can take a few minutes. Once all of the steam is released, remove the lid and shred the beef with two forks.
Make the potatoes
While the beef is cooking, preheat the oven to 400F and line a baking sheet with parchment paper and set it aside. You can also lightly grease a baking sheet with olive oil or use a non-stick baking dish if you don't have any parchment. Both are fine.
Transfer the potatoes to the baking sheet or dish.
Into a large mixing bowl add lemon juice, olive oil, mustard and whisk together to combine. Add salt, dried oregano and garlic and toss together well to coat the potatoes.
Cook for 30-40 minutes in the middle of the oven until the potatoes are tender and starting to brown. For extra crispiness finish your potatoes off with a 5-minute broil in the oven. Set aside.
Assemble the bowls
Once the potatoes and beef are cooked, assemble the bowls by adding potatoes, shredded beef, tomatoes, sliced onions, avocado, crumbled feta cheese and tzatziki. Top with a jammy hardboiled egg and enjoy!
Notes
How to make hard boiled eggs in an Instant Pot:
Add 1 cup of water to the Instant Pot.
Add the wire rack or steamer basket to the bottom of the Instant Pot.
Place the eggs on the wire rack or in the steamer basket.
Close the lid, make sure the valve is sealed. Set to Manual or Pressure Cook (high pressure) for 4 minutes for a runnier egg or 5 minutes for a hard boiled egg.
Set aside a bowl with ice cubes and water.
When the 4 or 5 minutes is up, quick release the pressure and immediately put the eggs in the ice water for 5 minutes. Remove from the water and peel. Cut in half for the bowls.