You can either cook your ground beef in the Instant Pot or a skillet - if cooking in the Instant Pot, you may want to clean it in between cooking the meat and and making the taco casserole. However, the IP gets hot so I prefer to cook the meat in a skillet and just do the taco casserole in the Instant Pot. (This is also great for prep-ahead days.)

To make the taco meat, add the ground beef to a large skillet over medium heat.

Stir and break up the ground beef while cooking for 3-5 minutes, until fully browned.

Drain off any excess fat and then add in the taco seasoning, tomatoes and black beans. Stir together and allow to cook for 3 additional minutes.

For the taco casserole, spread 3 Tablespoons or so of refried bean paste onto a tortilla and place it bean side-up in the Instant Pot.

Top with 1 cup of the ground beef mixture, then 1 cup of cheese. Repeat for 1-2 additional layers and then add a generous handful of cheese on top of a final tortilla.

Place the lid on your IP and seal. Cook for 5 minutes on Manual pressure - you can natural or quick release but natural release may dry out the cheese slightly.