If she really wanted to open a restaurant, it should reflect her *cough* values. We're facing massive job losses, so she could set up a restaurant that hires people who've been made redundant, or perhaps even long-term unemployed. Hiring homeless people would be even better. Cooking cheap, filling fare that's affordable when people don't have the money to go out to eat as much. Certainly not bowls of purple cabbage risotto with pickled beans.
Of course, she'd have to admit this idea has already been done by people much more dedicated than her, and to varying degrees of success, including by THAT MAN. His Fifteen cause was genuinely lovely and I'm sad that it failed - but, of course, opening a restaurant is one of the riskiest things you can do, even if you're hugely wealthy and a well-respected chef. Jack would fail completely.