Heat the oil in a heavy pot over medium heat. Add the onion and red bell pepper. Cook for 6–8 minutes until softened.
Add the bison, breaking it into chunks. Cook just until browned, about 5–7 minutes.
Stir in the garlic, chipotle, adobo sauce, tomato paste, and seasonings. Cook for 1 minute.
Pour in the IPA, scraping up any browned bits from the bottom. Bring to a gentle simmer for 3–5 minutes.
Add the crushed tomatoes and beans. Simmer uncovered for 40–50 minutes, stirring occasionally, until thickened. If it gets too thick, add a splash of water.
Taste and adjust the salt and chipotle. Simmer another 5–10 minutes if you add more pepper.
