Combine garlic, oregano, chili powder, vinegar, and water in the container of an electric blender; process until mixture is well blended. Place ground meat in a large mixing bowl; pour sauce over top of meat. Cover and refrigerate mixture overnight.
Drain meat mixture through a colander, discarding any liquid. Crumble meat mixture into a large skillet, and cook over medium heat, stirring occasionally, until meat is browned. Drain well. Transfer sausage to a serving platter, and serve warm.