Twisted trofie pasta and pesto sauce, served here with potatoes and green beans, is a Ligurian specialty.
Cut potatoes into 1/2-inch-thick rounds or pieces and cover with cold water by 2 inches in a medium saucepan. Bring to a boil; add salt. Reduce heat to medium; simmer potatoes until tender, about 10 minutes. Drain.
Bring one large pot and one medium pot of water to a boil; add salt to both. Add pasta to large pot; cook until al dente. Add green beans to medium pot; cook until tender, 5 to 6 minutes. Drain pasta and green beans.
Heat pesto in a large skillet over medium heat until warm. Stir in potatoes, pasta, and green beans; cook until heated through. Season with salt and pepper. Serve with cheese.