Season the Meat
Pat the bison dry.
Combine flour, salt, pepper, garlic powder, and smoked paprika.
Toss the bison until evenly coated.
Brown the Bison
Heat avocado oil in a large Dutch oven over medium-high heat.
Brown the meat in batches for 2–3 minutes per side.
Transfer to a plate.
Sauté the Vegetables
Add the onion, carrots, celery, and mushrooms.
Cook for about 6 minutes until softened.
Stir in the garlic and cook for another minute.
Build the Stew
Return the browned bison to the pot.
Add the potatoes, broth, diced tomatoes, tomato paste, Worcestershire sauce, thyme, rosemary, and bay leaves.
Stir well.
Simmer
Bring to a gentle boil.
Reduce heat to low.
Cover and simmer for 2½–3 hours, stirring occasionally, until the bison is fork tender.
Finish
Stir in the peas during the final 5 minutes of cooking.
Remove the bay leaves.
Taste and adjust seasoning.
Garnish with fresh parsley before serving.