Speaking at London's Vevolution festival yesterday, the vegan sisters shared some insight into their exciting project.
According to the pair, the eatery will be located in south west London, and will open in March next year.
Food for all
Tiffany said: "We want to serve hearty meals - filling and hearty, but healthy."
Lucy added: "We want to attract lots of non-vegans as well as vegans.
"We want people to bring their non-vegan partners, friends, and family. We are hoping to feed everyone."
Speaking at the festival, the siblings also spoke about turning down deals to work with brands who don't share their ethics.
Tiffany revealed that Lucy once refused a free Bentley because it had leather seats.
Lucy said: "I don't want things like that - they are tainted with death.
The pair also revealed their dreams for the future of veganism.
Lucy said: "My dream for the vegan community is for it to grow as much as possible, as quickly as possible."
Tiffany added: "Everyone I have met in the community has been so easy to talk to, as they have the same morals."