Saute the onions: Turn your Instant Pot on sauté mode, on HI. Spray with some cooking spray, and add the chopped onions and garlic. Sweat the onions until they are translucent - they do not need to be brown.
½ Yellow onion, 3 cloves Garlic
Brown the beef: Once the onions have softened, add the ground beef to the Instant Pot. With a wooden spoon or silicon spatula, break down the ground beef. Again, it does not need to be browned, just broken down.
1 lb Ground beef
Add the remaining ingredients: Add the chopped chiles, diced tomatoes, chicken broth, kidney beans, and spices to the pot. Stir, and cover with the lid.
1 ½ tablespoon Chili powder, 1 tablespoon Adobo seasoning, ½ tablespoon Smoked paprika, 1 teaspoon Cayenne pepper, 1 cup Chicken broth, 15 oz can Red kidney beans, 10 oz can Rotel diced tomatoes, 4 oz can Diced green chiles, Salt to taste
Pressure cook: Ensure your pressure valve is set to sealing position. Pressure cook the chili for 20 minutes on HI. Quick release once done. While the chili is cooking, mix together the corn starch slurry and set aside.
1 tablespoon Corn starch, 1 tablespoon Cold water
Thicken: Once the pressure has released, switch to sauté mode once again on HI. Let the chili simmer for 5 minutes. After 5 minutes, add the corn starch slurry and simmer for another 5 minutes.