You want the special to become standing, or the standing dish to come off because the supplier slipped. Your partner is on the other shift. Your assistant wrote a paragraph about the story of the dish. The story is not the order guide.
A menu change is a decision two people have to cook under. Write the operations, then the taste.
One item, add drop or swap
Name the decision. "I need you to choose whether we drop the pork special on Monday, swap it for the beans, or keep it through the month." Say what it does to prep minutes, to the order you already placed, and to the one station that is already tight. Then your lean, and the fact that would flip it — a delivery that lands, a cook who is back.
Do not attach the costing sheet. RelayLink does not carry attachments. Describe the dish as it is printed, the portion, the one supply constraint. Files stay where you already keep the books.
A tasting note can live in the human note. The ask cannot be "what do you think about the menu." That is a meeting after service.
Assumptions that break on a Saturday
Write the premise the change depends on. You assumed they still want the dish on the board. You assumed the second supplier is acceptable. You assumed the allergen line does not change. A partner will correct a labelled line between services. They will not unpick a lyrical paragraph at midnight.
If your assistant inferred that "people love it" from a handful of compliments, mark that inferred. Compliments are not covers.
One mailbox, one reply, then you change the board
You approve the send. Use the dish name as it is printed. A nickname you use for your partner stays on your side of the contact list.
They do not need an account. Many partners will never sign in. They get email and a page, and they can reply there. If they already have an activated account, a new thread needs an accepted pair. The reply is the point: add, drop, or swap, and the Monday you named.
If you have a third partner, one briefing still goes to one mailbox. Say who else must see it before you reprint.
After they answer
Write back the change and the date, and ask them to correct that sentence. Then change the board and the order. Do not leave the old item in the specials slot "just in case." That is how two stations prep the same protein.
Taste can still be argued in the walk-in. The briefing is for the change you both have to run.