3 Tbsp finely grated Parmesan, plus extra for serving
Freshly ground black pepper
½ cup reserved pasta water
How To Make Frozen-Lemon Pasta
1. Wash and dry the lemon, then freeze it overnight until solid. 2. Cook the spaghetti in well-salted boiling water until al dente. Reserve ½ cup of the pasta water before draining. 3. Place the butter, Parmesan and black pepper in a large mixing bowl. 4. Finely grate approximately one-third of the frozen lemon – including the zest, flesh and only a little pith – directly into the bowl. 5. Add the hot pasta and ¼ cup reserved pasta water. Toss vigorously until the butter and Parmesan form a glossy sauce. 6. Add more pasta water, a splash at a time, until the sauce coats the spaghetti. Finish with Parmesan and black pepper.