准备

• Finely zest the lemons using a rasp-style grater to get 2 Tbs. zest, then mince the zest with a chef’s knife. Juice half of 1 lemon and cut the other half into wedges for serving. (Or use an unzested lemon if you want prettier-looking wedges.)
• In a large bowl, combine the flour, 1 heaping tsp. of the lemon zest, and a pinch of salt. Use your fingers to help disperse the zest into the flour. Add the ricotta and egg, and mix until a dough starts to form. (If the dough is very sticky, add up to an additional 2 Tbs. flour.)
• Line two large rimmed baking sheets with parchment and sprinkle lightly with flour. Lightly dust a work surface with flour. Turn the dough onto the work surface, and knead briefly until soft and smooth, but still a little sticky.
• Lightly reflour the work surface. Turn the dough onto the flour and gently flatten by hand or with a rolling pin until about 3/4 inch thick. If the dough is sticky, lightly dust the top with flour.
• With a floured bench scraper or a knife, cut the dough into strips from 1/2 to 3/4 inch wide. With your hands, roll and lengthen the strips until about 1/2 inch in diameter. Cut the logs into 3/4-inch pieces.
• Arrange the gnocchi in a single layer on the prepared baking sheets, making sure they don’t touch. Cover with plastic wrap and refrigerate for up to 4 hours. If you want to hold them longer, freeze until hard, transfer to a zip-top freezer bag, and keep frozen for up to 1 month; do not defrost before cooking.
• Bring a large pot of well-salted water to a boil.
• 同时，在大煎锅中融化了2汤匙。用中火的黄油。加入葱和大量的盐。煮，偶尔搅拌，直到葱变软并变得半透明，约2分钟。加1汤匙。柠檬汁，剩下的柠檬皮和百里香，煮约30秒。从火上移开并保持温暖。
• Reduce the heat so the water is simmering. Add the gnocchi and cook, stirring once, until they float to the surface, 1 to 3 minutes.
• While the gnocchi cook, transfer about 1/4 cup of the cooking water to the skillet. Bring to a simmer, and whisk in the remaining 2 Tbs. butter. Using a slotted spoon, transfer the gnocchi to the sauce, and toss gently to coat. Season to taste with salt, and serve topped with grated cheese and a lemon wedge on the side.