1. Preheat oven to 350 degrees. Lightly oil a large baking dish; set aside.

2. Place 1/2 pound ground bison, 1 piece of yellow pepper, 1 piece of red pepper, 1 piece of onion, 1 1/2 teaspoons rosemary, 1 1/2 teaspoons sage, 1 1/2 teaspoons oregano, and 1/2 clove garlic in the bowl of a food processor; process until well combined. Transfer mixture to a large bowl. Repeat process three more times with remaining bison, peppers, onion, rosemary, sage, oregano, and garlic.

3. Add 2 tablespoons olive oil to bowl with bison mixture and season with salt and pepper; mix until well combined. Using your hands, form bison mixture into a loaf and place in prepared baking dish. Transfer to oven and bake for 30 minutes.

4. Add chicken stock, wine, and tomatoes to baking dish; bake, basting with juices every 15 minutes, until meatloaf is firm to the touch and pan juices are bubbly, about 1 hour more.

5. Let meatloaf stand 5 minutes before slicing and serving with pan juices.