In a large bowl, combine all meatball ingredients and mix with your hands until well combined. Use a small scoop or roll by eye into small meatballs, about 1 inch in diameter.
Heat a large skillet over medium heat with a drizzle of olive oil. Cook the meatballs until browned and cooked through, turning every 5-7 minutes to evenly brown them.
Remove the meatballs from the pan and set aside, but keep all the browned bits in the pan. Add the garlic to the pan and cook about 1 minute. Then add the butter and flour to the pan and cook until the flour is slightly browned, 2 minutes.
Add the vermouth to the pan. Cook, scraping up all the browned bits stuck to the bottom, about 2 minutes. Then add the chicken stock and lemon juice to the pan. Cook, stirring, until the sauce is thickened, 5 minutes.
Add the cream and capers (as many as you like depending on how much you like capers) and stir, cooking one minute more. Taste and season with salt and pepper as needed.
Remove the pan from the heat. Add the meatballs back to the pan and toss in the sauce.