public ActionResult AddToCupboard(int id)
        {
            RecipeBL recipeBL = new RecipeBL();
            Recipe recipe = recipeBL.GetRecipes().Where(m => m.ID == id).Single();
            List<Recipe> recipes = GetSessionRecipes();

            recipes.Add(recipe);
            SaveSessionRecipes(recipes);
            return RedirectToAction("Przepisy");
        }

        public ActionResult DeleteFromCupboard(int id)
        {
            RecipeBL recipeBL = new RecipeBL();
            List<Recipe> recipes = GetSessionRecipes();
            Recipe recipe = recipes.Where(m => m.ID == id).Single();

            recipes.Remove(recipe);
            SaveSessionRecipes(recipes);
            return RedirectToAction("Cupboard");
        }