1. Bring a large pot of water to a boil. Add salt and pappardelle, and cook until pasta is al dente, following label directions. Drain in a colander, reserving 1 cup cooking water.

2. While pasta is cooking, combine olives, parsley, olive oil, thyme, lemon zest, orange zest, and red-pepper flakes in the bowl of a food processor fitted with the steel blade. Pulse until a chunky puree forms. Transfer to a warm serving bowl large enough to accommodate cooked pasta.

3. Add pasta, and toss to combine. Add 1/4 cup cooking water, and toss to combine. Add more water if necessary; pappardelle has a tendency to absorb liquid quickly, so more water may be needed. The sauce should cling to ribbons of pasta but should not be dry. Serve immediately.