Preheat the oven to 375 degrees.
In a small mixing bowl combine all of the meatball ingredients using your hands. Form 2 inch meatballs, and line them up on a Silpat or parchment paper lined baking sheet.
Bake the meatballs in a 375 degree oven for 15 minutes. While the meatballs are baking, you can make the gravy.
Melt the butter in a skillet, and add the mushrooms. Cook over medium heat for 5-7 minutes stirring occasionally until the mushrooms become fragrant and golden.
Add the garlic and green onions and cook for a couple minutes.
Deglaze the pan with the red wine, and then add the bone broth, sprinkle in the rice flour, and bring to a low simmer for 5 minutes, stirring occasionally.
Season the gravy with salt and pepper to your taste and add the cooked meatballs. Serve with veggie sides.