It's better to avoid the use of aluminium cookware and foils specially when cooking with acidic foods like lemons and tomato paste.
Molokhia, Okra, and Taro must be cooked with lemon juice so they don't get slimy.
When boiling potatoes, add a few drops of lemon to preserve their white color.
Don't crowd your pan when frying foods. And don't turn the food until it is cooked thoroughly on one side.