Thomasina "Tommi" Miers (born 1976) is an English cook, writer and television presenter. She is married to Mark Williams.
Born in Cheltenham in February 1976, she studied at Ballymaloe Cookery School and worked as a freelance cook and writer, with influences from time spent in Mexico.
In 2005 she won the BBC TV cookery competition MasterChef, "impressing judges John Torode and Gregg Wallace with her bold and, at times, eccentric cooking style".
She has made two series of cookery programmes for Channel 4 with co-presenter Guy Grieve: Wild Gourmets in 2007 and A Cook's Tour of Spain in 2008.
She is co-editor with Annabel Buckingham of the cookbook Soup Kitchen (with an introduction by Hugh Fearnley-Whittingstall). She is the author of Cook: Smart Seasonal Recipes for Hungry People, The Wild Gourmets: Adventures in Food and Freedom, with Guy Grieve, and Mexican Food Made Simple.
She opened the first of her own restaurants, Wahaca, in the West End of London in August 2007, focused on Mexican street foods. In October 2008 a second Wahaca opened at Westfield in London.