public void Add(Recipe recipe)
 {
     if (recipe != null)
     {
         List<Recipe> tempList = new List<Recipe>();
         Clear();
         recipe.IsRoot = true;
         recipe.BuildRecipe(HotItemController);
         tempList.Add(recipe);
         Recipes = new ObservableCollection<Recipe>(tempList);
         SelectedRecipe = recipe;
     }
 }