The Preston House in Riverhead (theprestonhouseandhotel.com, 631-775-1550) will feature its new late spring a la carte menu for both brunch and dinner on Mother’s Day. Choose from Chef Matthew Boudreau’s main menus and specials. Brunch will be served from 11:30 a.m. to 2:30 p.m. and dinner will be served from 4 to 9:30 pm. Reservations are recommended. Go online or call.