Bring a pot of water to a boil and cook the rice noodles according to the package instructions.
Once cooked, drain the noodles and rinse them with cold water to stop the cooking process.
Set the rice noodles aside to cool and drain any excess water.
In a large bowl, combine the shredded lettuce, shredded carrots, julienned cucumber, chopped cilantro, chopped mint leaves, chopped peanuts, thinly sliced red bell pepper, and sliced green onions.
Toss the vegetables and herbs gently to mix them together evenly.
In a separate small bowl, whisk together the hoisin sauce, peanut butter, soy sauce, rice vinegar, lime juice, sesame oil, sugar, minced garlic, grated ginger, and chili flakes.
Continue whisking until the dressing is smooth and fully combined.
Taste the dressing and adjust seasoning if needed by adding more lime juice or soy sauce as desired.
Pour the dressing over the mixed salad ingredients and toss gently to coat everything evenly.
Add the cooled rice noodles to the salad and toss again, ensuring they are evenly incorporated with vegetables and dressing.
Serve immediately; garnish with additional chopped peanuts, cilantro, or mint leaves if desired.
Enjoy your Spring Roll Salad with Peanut Dressing!