Bring a pot of salted water to a boil. Add pasta, and cook until al dente. Drain, and then drizzle with just enough oil to coat. Spread on a baking sheet, and refrigerate 10 minutes.
Meanwhile, heat oil in a large skillet over medium heat. Add shallot and red-pepper flakes, and cook until shallot has softened, about 4 minutes. Add mushrooms, and cook until softened, about 5 minutes. Add wine, and cook until reduced by three-quarters, 2 to 3 minutes. Remove from heat.
Add herbs, lemon zest and juice, and radicchio, and toss until radicchio has wilted. Add pasta, Gorgonzola, salt, and pepper; toss. Serve at room temperature.