1. Preheat oven to 300°F (150°C).

2. Boil or bake the sweet potato until tender, then mash it until smooth.

3. In a large bowl, combine ground beef, mashed sweet potato, and eggs.

4. Gradually add oats or oat flour until the mixture reaches a moldable dough-like consistency.

5. Mix in finely chopped parsley if desired.

6. Shape the mixture into small sticks or preferred shapes and place on a parchment-lined baking sheet.

7. Bake for 60-90 minutes based on desired texture.

8. Let chews cool completely before serving.