Bring a large pot of salted water to a boil. Meanwhile, in a medium saucepan, whisk together the broth, peanut butter, Sriracha sauce, honey, soy sauce, ginger and garlic. Bring to a simmer over medium heat, stirring until the peanut butter is melted and the sauce is smooth.

Add the linguine to the boiling water and cook according to package directions. Drain and add noodles to a large bowl. Add the peanut sauce and toss to coat well.

Serve topped with green onions, cilantro, lime wedges and chopped peanuts, if desired.