1. In a large mixing bowl, add the ground venison, bread crumbs, egg, chopped onion, chili powder, salt, and pepper. Using your hands, mix to combine well.
2. Form the meat mixture into 1-inch meatballs.3. Heat the olive oil in a skillet over medium heat. Add the meatballs and cook, rotating often, until fully cooked through.
5. Bring the sauce to a simmer, then reduce heat to low and let simmer for 5-7 minutes, or until the sauce has thickened.
6. Remove from heat and serve.