Cook rice noodles according to package directions. In a large bowl, whisk together lime juice, sesame oil, fish sauce, sugar, salt, and Sriracha. Add cooked noodles and toss to coat.
Arrange noodles in individual bowls, topped with choice of protein, then garnish with carrots, green onions, cilantro, cucumber, and jalapeños. Serve with additional sauce on side and lime wedges.