Porcupine Meatballs

1 lb. ground beef 1 egg 2 cups cooked brown rice 1 cup shredded carrot 1/2 cup diced onion, microwaved to soften 1-2 cloves garlic, crushed squeeze of lemon juice chili powder celery seed sea salt black pepper mustard tomato juice or sauce? Mix all ingredients together except tomato juice/sauce, form into meatballs, bake uncovered at 350 for 30 minutes, then uncovered for 15? I'm baking these right now; I made 28 using my cookie dough scoop. Update: I didn't use any sauce. Sam will really like these. I would like them better with soy sauce or ketchup or more salt, none of which he can have for now. The onions were still crunchy after an hour in the oven so next time I'll microwave them a little before mixing into the meat.