Cut the bell peppers and onions into 3/4-inch squares.
Cut the beef into bite-sized chunks, roughly 1-inch cubes. Preheat the skillet over medium high heat and grease the pan with olive oil. Sprinkle the beef with salt and sear it for 5 minutes.
Put the seared beef, cut bell peppers and onions, garlic cloves, crushed tomatoes, and kidney beans into a slow cooker, a large pot, or an instant pot. Also add chopped chipotle pepper in adobo sauce (including the sauce), paprika powder, dried oregano, cumin, and cilantro.
If using a slow cooker, cook on high heat for 8 hours. If using a pot, bring the chili to a boil over medium heat, then reduce the heat to low and simmer for 2 hours with the lid on. If using an instant pot, cook on high pressure for 30 minutes. The beef will be fall-apart tender when finished cooking.
Serve the beef chili with various toppings, such as shredded cheddar cheese, chopped onion, chopped scallion, cilantro, sour cream, and Jalapeño peppers.