Add the pasta to the boiling water and cook until al dente, 10 minutes. Meanwhile, place the potatoes, green beans, and pesto in a large bowl. Drain the pasta and add to the bowl. Mix together ...

until the green beans are cooked through but still have a little bite. Fold in the noodles and allow to just warm through. Add the bean sprouts and cook for 30 seconds or so to keep them crisp.