How to Make It
In a very large skillet, heat 2 tablespoons of the oil until shimmering. Add the mushrooms and a generous pinch of salt. Cook over moderately high heat, stirring occasionally, until the mushrooms are browned and crisp, about 7 minutes. Add the shallot and the remaining 2 tablespoons of oil and cook until the shallot is softened, about 2 minutes. Add the snap peas to the skillet and cook, stirring, for 1 minute.
Add the sherry to the skillet and simmer until reduced by half, about 3 minutes. Add the cream and simmer until the mushrooms and snap peas are coated in a light sauce, about 3 minutes. Stir in the lemon juice and season with salt. Transfer to a platter, garnish with finely grated lemon zest and serve.