It may not have the opulence of Adour Alain Ducasse or the pedigree of L’Atelier de Joël Robuchon. But the Chef’s Table at Brooklyn Fare — an 18-seat bar and open kitchen inside a Boerum Hill grocery store — has something neither of those places has: two stars from the new Michelin Guide to New York, making it that book’s highest-rated restaurant outside Manhattan.