How to Make It
In a small measuring bowl, crumble the saffron into the heavy cream. In a large skillet, heat 2 tablespoons of the olive oil until shimmering. Add the turnip greens and cook over moderately high heat, tossing, until wilted and tender, about 3 minutes. Transfer to a bowl and keep warm. Wipe out the skillet.
Heat the remaining 2 tablespoons of olive oil in the skillet until shimmering. Season the scallops with salt and pepper and add them to the skillet in a single layer. Cook over high heat until browned on the bottom, 3 to 4 minutes. Turn and cook until lightly browned and opaque throughout, about 2 minutes longer. Transfer the scallops to a plate and pour off any oil in the skillet.
Melt the butter in the skillet. Add the shallot and cook over moderately high heat, stirring, until softened, about 1 1/2 minutes. Add the vermouth and cook, scraping up any browned bits from the bottom of the pan, until nearly evaporated. Add the saffron cream and simmer until thickened and slightly reduced, 3 to 4 minutes. Season the sauce with salt and pepper. Mound the turnip greens on plates, top with the scallops and sauce and serve.