public function destroy(Request $request)
 {
     foreach ($request->input('to_delete') as $item_id) {
         Ingredient::destroy($item_id);
     }
     return Redirect::to('ingredients');
 }
 public function deleteIngredient($ingredient_id)
 {
     \App\Ingredient::destroy($ingredient_id);
     return redirect()->route('ingredients');
 }