1/2 cup grated Parmesan cheese , plus extra for serving
1 1/2 tablespoons lemon juice
1/4 cup thinly sliced fresh basil
1. Bring 4 quarts water to boil in large pot for cooking pasta. Meanwhile, melt butter in large skillet over medium heat until foaming. Add onion, mushrooms, 1/2 teaspoon salt, and 1/2 teaspoon pepper and cook until soft and browned, about 8 minutes. Add garlic and cook until fragrant, about 1 minute. Stir in tomatoes and cream, increase heat to high, bring to boil, and remove pan from heat.
2. As sauce cooks, add 2 tablespoons salt and pasta to boiling water and cook until just beginning to soften, about 6 minutes. Add asparagus to pot and cook for 1 minute. Add zucchini and cook for 2 minutes. Add peas and cook until pasta is al dente, about 1 minute.
3. Drain pasta and vegetables and return to pot. Toss in cream sauce, cheese, lemon juice, and basil and season with salt and pepper. Serve, passing extra cheese at table.
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