In your Instant Pot on “Sauté” mode, melt the butter and sauté the onion and pepper until translucent, about 5 minutes. Add the garlic and jalapeño and continue to sauté for another 2 minutes.Add the ground beef and brown for about 5 more minutes. Add the water, can of tomato, and spices. Cook until fragrant, about 5 minutes.
Place the beef mixture into another large bowl so your Instant Pot is empty. There is no need to clean it.
Pour 1/3 of the mixture back into the Instant Pot. Cover that layer with 3 or 4 tortillas. They can overlap.
Cover the tortillas with another layer of the beef mixture. Repeat this layering process twice and top with a final layer of the beef.
Then switch to “Pressure Cook” mode. Make sure the steam release handle is in the “Sealing” position. Set for 5 minutes on high pressure.
When the timer beeps, you can perform a quick release by moving the pressure release to “Venting,” or you can let the pressure release naturally.