- In a shallow dish, mix Montreal Steak Seasoning, red wine vinegar, and olive oil. 
- Add chicken breasts, cover, and refrigerate for at least 30 minutes. 
- Preheat your oven to 350°F. 
- Remove chicken from marinade; cook it in a skillet over medium heat until done. 
- Chop the avocado, tomato, and onion into small pieces. 
- Set them aside to add later. 
- Place a tortilla on a flat surface. 
- Add cooked chicken, black beans, vegetables, and cheese. 
- Roll the tortilla tightly. 
- Place burritos in a baking dish and bake in the preheated oven for approximately 20 minutes.