Chop all the veggies and heat oil in a large pot over med-high.
Add onions and celery and cook until translucent, stirring occasionally (~6-8 min).
Add peppers and cook down (~5 min).
Stir in garlic until fragrant (~30 sec) then add bison and spices and cook until browned (~5 min).
Stir in tomato sauce, chilies, and crushed tomatoes until well combined. Bring to a boil then reduce heat to med-low and simmer for ~20min. Serve warm.
Notes
Serve with sliced limes, sour cream, shredded cheese, cilantro, and/or avocado, if desired.