Press Sauté on your Instant Pot and let it heat for 1–2 minutes. Add the olive oil, then the ground beef and chopped onion. Cook, breaking the meat up with a wooden spoon, for about 5–7 minutes until the beef is browned and the onion is softened. If using fattier beef, you can tilt the pot and spoon off some of the extra fat.
1 tablespoon olive oil, 1 pound lean ground beef, 1 medium yellow onion
Stir in the minced garlic and cook for 30–60 seconds, just until fragrant. Add the salt, black pepper, paprika, Italian seasoning, and onion powder. Stir well so the spices coat the meat.
3 cloves garlic, 1 teaspoon kosher salt, 1/2 teaspoon black pepper, 1 teaspoon paprika, 1 teaspoon dried Italian seasoning, 1/2 teaspoon onion powder
Pour in about 1/4 cup of the beef broth and use a wooden spoon to scrape up any browned bits stuck to the bottom of the pot. Continue scraping until the bottom feels smooth to help prevent a Burn warning.
1 1/2 cups low-sodium beef broth
Stir in the rinsed white rice, making sure it is evenly distributed. Pour in the remaining beef broth. Add the diced tomatoes with their juices and the tomato paste. Gently stir everything together without packing the rice down. The rice should be mostly submerged in liquid.
1 cup long-grain white rice, 1 1/2 cups low-sodium beef broth, 1 can diced tomatoes, 2 tablespoons tomato paste
Sprinkle the frozen mixed vegetables evenly over the top of the mixture and do not stir. This allows the rice to cook evenly on the bottom while the vegetables steam on top.
1 cup frozen mixed vegetables
Secure the lid and set the valve to Sealing. Select Manual or Pressure Cook, set to High Pressure for 8 minutes. The pot will take about 8–10 minutes to come to pressure before the cook time starts.
When the cook time ends, let the pressure naturally release for 5 minutes. Then carefully turn the valve to Venting to quick release the remaining pressure. Once the pin drops, open the lid away from your face.
Gently stir and fluff the beef and rice mixture with a fork or large spoon. If it looks slightly liquidy, let it sit for 3–5 minutes on Keep Warm to thicken. Sprinkle the shredded cheddar cheese over the top, then close the lid (no need to seal) for a couple of minutes to let the cheese melt.
1 cup shredded cheddar cheese
Taste and adjust seasoning with additional salt, pepper, or paprika if desired. Garnish with chopped fresh parsley or green onions. Serve hot, straight from the Instant Pot.
1 teaspoon kosher salt, 1/2 teaspoon black pepper, 1 teaspoon paprika, 2 tablespoons fresh parsley or green onions