Taking over the space that previously housed The Colony Grill, Rosi will be ‘rooted in seasonality and British provenance’ with the menu set to feature signature pies and high-quality steaks including cuts of English wagyu, Lake District beef and heritage Hereford herds.
There will also be desserts created with tableside theatre in mind including a flamed seasonal sponge with custard, and a build your own sundae option.
“Rosi is a restaurant where the menu is full of dishes you really want to eat, and the atmosphere is just as inviting,” says Goodwin-Allen, who was appointed culinary director at The Beaumont Mayfair earlier this year.
“I hope Rosi will be embraced by Londoners, just as I have been.”
Leading the restaurant alongside Goodwin-Allen will be executive chef Brendan Fyldes and executive head chef Jozef Rogulski.
The concept and team have been brought together by The Beaumont’s CEO, Stuart Procter, whose career has overlapped at various points with Goodwin-Allen and Fyldes, including at Northcote in Lancashire, where Goodwin-Allen is chef patron-director.
The restaurant is named in honour of Rosemary Saïd, wife of businessman and philanthropist Wafic Saïd, owner of The Beaumont Mayfair.

According to the hotel, the design will ‘move away from the somewhat masculine, clubby feel of The Colony Grill towards a bright and characterful interior using a vibrant colour palette and tactile materials’.
“Rosi represents everything we love about British dining; seasonal ingredients, timeless dishes and genuine warmth.” says Procter.
“With Lisa at the helm and Brendan and Jozef by her side, we’re bringing a new energy to The Beaumont and reimagining what dining in Mayfair can feel like.”
The plans for Rosi come amid a dramatic year for Goodwin-Allen.
Back in April she announced she would be rejoining Northcote in the Ribble Valley as chef patron-director, little more than a month after confirming her departure from the luxury Lancashire hotel’s Michelin-starred restaurant after 23 years behind the stoves.
Her decision to return to Northcote followed its sale by The Stafford Collection to Silkstone Finance, the investment vehicle of husband-and-wife team Alf and Clare Ellis, who also run Pontefract-based kitchen manufacturer Ultim.