Spontaneous.WebApp.Services.DefaultMenuUtility.CheckCuisineSafety C# (CSharp) Method

        public List<string> CheckCuisineSafety(List<string> cuisineList) 
        {
            if (cuisineList != null)
            {
                List<string> safeCuisineList = new List<string>() {
                                                                    "kebab",
                                                                    "hummus",
                                                                    "sushi",
                                                                    "cafe",
                                                                    "italian",
                                                                    "pizza_finland_sweden",
                                                                    "burger_finland_sweden",
                                                                    "italian_finland_sweden",
                                                                    "finnish_finland_sweden",
                                                                    "sushi_finland_sweden",
                                                                    "chinese_finland_sweden",
                                                                    "asian_finland_sweden",
                                                                    "sandwich_finland_sweden",
                                                                    "kebab_finland_sweden",
                                                                    "ice cream_finland_sweden",
                                                                    "steak_finland_sweden",
                                                                    "fish_finland_sweden",
                                                                    "pasta_finland_sweden",
                                                                    "coffee_shop_finland_sweden",
                                                                    "regional_finland_sweden",
                                                                    "seafood_finland_sweden",
                                                                    "american_finland_sweden"
                                                                  };
                List<string> returnList = new List<string>();

                foreach (string cuisine in cuisineList) 
                {
                    if(safeCuisineList.Contains(cuisine)) returnList.Add(cuisine);
                }
                return returnList;
            }
            else 
            {
                return null;
            }
        }