If you use fresh green beans just make sure to snap the ends and boil them to cook them through.Chop white onion, mushroom and garlic together.Add two tbsp of butter to a saucepan and heat over medium heat.Add onion, mushroom and garlic and cook until fragrant and mushrooms have cooked down.Add the cream and chicken stock and bring to a boil.Once boiling turn down to simmer and allow to simmer for 10-15 minutes.Add xanthem gum and stir until sauce is thick.Add green beans to the cream sauce and coat thoroughly.Transfer green beans to a skillet and top with crumbled pork rinds.Place in 350 degree oven for ten minutes.