Cook pasta in large pot of boiling salted water until just tender but still firm to bite, stirring occasionally. Drain, reserving 1/2 cup pasta cooking liquid. Heat oil in same pot over medium-high heat. Add mushrooms; sauté until tender and brown, about 6 minutes. Add salami; toss 30 seconds. Add pasta, 1/2 cup cooking liquid, sliced vegetables, reserved marinade, and 1 1/2 cups cheese; toss until liquid thickens and coats pasta, about 3 minutes. Mix in 1 1/2 cups basil. Season with pepper. Transfer to bowl. Sprinkle with 1/2 cup basil; serve with 1/2 cup cheese.