Kitchen Secrets

I love recipesecrets, but I wonder if there are those who know kitchen secrets?? For example, I’ve been told restaurants cook pasta ahead of time and then bag portions and refrigerate until an order is called for. Anyone know any other kitchen secrets? Like can you chop veggies ahead of time,without them going brown;such as celery and onions?

A lot of foods are prepared and bought by the restuarant. For instance hashbrowns are bought dehydrated, then rehydrated before cooking. Hopefully this helps you out.