Improve the flavor of ripe olives by letting them stand overnight in olive oil to which you have added a tiny clove of garlic

If eggplant is bitter it’s probably because you stored it in the refrigerator.
That also brings on brown spots. Keep it at room temperature.

If a bag of marshmallows get stale, drop a couple of slices of fresh bread in the bag, leave it closed for a couple of days. They will become soft and fresh tasting.

When boiling eggs prick a tiny hole at the flatter end and add a small quantity of vinegar to the water to prevent white leaking - when poaching eggs again add a small quantity of vinegar to the water to keep the white together (no more white jelly fish!)