Hallsworth founded and ran three Kurobuta restaurants located in the city's Chelsea, Knightsbridge and Marble Arch areas until May 2017.
In March 2018 Hallsworth opened a permanent Freakscene restaurant in London's West End at 54 Frith Street[6] in Soho.
Hallsworth left high school when he was 16 to take up an offer of an apprenticeship with ex-La Gavroche sous chef Alain Doisneau.
[12] Post-apprenticeship, Hallsworth moved to Perth where he worked for the Hyatt Hotel[13] and the popular 44 King Street Brasserie.
Following a 6-week road trip around Australia, Hallsworth decided to stay and work at Hayman Island Resort, situated on the Great Barrier Reef in North Queensland.
[20][21] Hallsworth's barbecue pork belly in steamed buns with spicy peanut soy appeared on Channel 4 cooking programme The Sunday Brunch with Tim Lovejoy and Simon Rimmer on 11 May 2014.
[22] A book by Hallsworth, Junk Food Japan, was published in 2017, and contains specially commissioned photography by David Loftus.