3 large egg yolks
1/4 cup fresh lemon juice
1/2 cup whipping cream

3/4 cup freshly grated Parmesan cheese plus additional for serving
1/4 cup chopped fresh Italian parsley

Place yolks in medium bowl. Gradually whisk in lemon juice, then cream.

Cook artichoke hearts and green beans in large pot of boiling salted water until crisp-tender, about 5 minutes. Using sieve, transfer vegetables from pot to large skillet. Return water to boil. Add pasta; boil until tender but still firm to bite. Drain pasta, reserving 1 1/2 cups cooking liquid.

Add pasta to skillet with vegetables. Whisk 3/4 cup cooking liquid into yolk mixture. Add yolk mixture, 3/4 cup cheese, and parsley to skillet. Toss over medium heat just until sauce thickens and coats pasta, about 4 minutes, adding more cooking liquid by tablespoonfuls if dry. Season with salt and pepper. Serve, passing additional cheese alongside.

Makes 4 servings.

1/4 cup (1/2 stick) unsalted butter
2 1/2 cups chopped onions
1/2 pound crimini (baby bella) mushrooms, sliced (about 3 cups)

Olive oil
1 9-ounce package no-boil lasagna noodles

Melt butter in large skillet over medium-high heat. Add onions; sauté until soft, about 8 minutes. Increase heat to high; add mushrooms and cook until tender, stirring constantly, about 3 minutes. Season with salt and pepper. Transfer mushroom mixture to bowl; set aside.

Add squash, broth, 3 tablespoons thyme, and 3 tablespoons sage to same skillet. Cover and simmer over medium heat until squash is just tender, about 6 minutes. Uncover and cook until squash is very soft but still retains shape, about 5 minutes. Season with salt and pepper.

Mix ricotta, 2 cups mozzarella cheese, 1 1/2 cups Parmesan cheese, and remaining 1 tablespoon thyme and 1 tablespoon sage in large bowl. Season to taste with salt and pepper; mix in eggs.

Brush 13×9x2-inch glass or ceramic baking dish with oil. Spread 1 cup ricotta mixture over bottom. Arrange 3 noodles on top. Spread 13/4 cups ricotta mixture over noodles. Arrange 1 1/3 cups squash mixture over. Sprinkle with 1/2 cup mushrooms and 1 cup mozzarella. Top with 3 noodles, then 1 3/4 cups ricotta mixture, half of remaining squash, 1/2 cup mushrooms, and remaining 1 cup mozzarella. Repeat with noodles, 1 3/4 cups ricotta mixture, remaining squash, and remaining mushrooms. Top with 3 noodles. Spread remaining ricotta mixture over; sprinkle with remaining Parmesan. Cover with oiled foil.

Preheat oven to 350°F. Bake lasagna, covered, 35 minutes. Uncover; bake until heated through, about 25 minutes longer. Let stand 10 minutes before serving. (The lasagna can be assembled one day ahead and refrigerated.)

3 tablespoons olive oil, divided
1 pound Italian sweet sausages, casings removed
2 ounces sliced prosciutto, chopped

Olive oil

For sauce:
Heat 1 tablespoon oil in large saucepan over medium-high heat. Add sausage; sauté until browned, breaking up with fork, about 6 minutes. Add prosciutto; stir 1 minute. Transfer mixture to bowl.

Heat 2 tablespoons oil in same pan over medium-high heat. Add onions and next 4 ingredients. Sauté until tender, about 5 minutes. Stir in tomato paste. Add tomatoes with reserved juice, basil, and sausage mixture. Reduce heat; simmer until sauce thickens, stirring occasionally, about 15 minutes. Season with salt and pepper. (Can be made 1 day ahead. Cover and refrigerate.)

For lasagna:
Cook noodles in large pot of boiling salted water until just tender but still firm to bite. Drain. Arrange in single layer on baking sheet. Stir ricotta and 1 1/2 cups mozzarella in bowl. Season with salt and pepper; mix in egg.

Brush 13×9x2-inch glass baking dish with oil. Spread 1 cup tomato sauce evenly over bottom. Arrange 3 noodles atop sauce. Spread 3/4 cup cheese mixture thinly over noodles. Spoon 1 1/2 cups sauce over. Repeat with noodles, cheese mixture, and sauce 2 more times. Cover with 3 noodles. Sprinkle with remaining 1/2 cup mozzarella. Cover with foil. (Can be prepared 1 day ahead. Chill.)

Preheat oven to 350°F. Bake lasagna, covered, 40 minutes. Uncover and bake until heated through, about 15 minutes longer. Let stand 10 minutes and serve.

Makes 8 servings.