1. Roast pepper over a gas flame, turning, until blackened, about 8 minutes. (Or blacken under broiler.) Transfer to a bowl; cover with plastic wrap. Let stand 10 minutes. Remove skin, stem, ribs, and seeds. Tear into 2-inch pieces. Puree in a blender with tomatoes, anchovies, capers, raisins, almonds, cheese, and oil; season with salt and pepper.

2. Meanwhile, cook pasta in a large pot of generously salted boiling water until al dente. Reserve 1 cup pasta water; drain pasta and return to pot.

3. Add pepper mixture, then reserved pasta water, a little at a time, until sauce evenly coats pasta. Serve, topped with cheese, almonds, and parsley, and drizzled with oil.