Start by cooking the rice noodles according to package instructions until al dente. Once cooked, drain and set aside.
In a large pan over medium heat, add the vegetable oil. When hot, add the red curry paste and sauté for about 1-2 minutes until fragrant.
Pour in the coconut milk, soy sauce, lime juice, and brown sugar. Stir well and bring the mixture to a gentle simmer.
Add the sliced bell peppers and snap peas to the pan. Let them cook for about 3-4 minutes until slightly tender but still crisp.
Toss in the cooked rice noodles and bean sprouts, mixing them well with the sauce and vegetables. Cook for another 2-3 minutes until everything is heated through.
Taste and adjust seasoning with salt as necessary.
Remove from heat and serve immediately, garnished with sliced green onions, fresh cilantro, and crushed peanuts on top.
Notes
Adjust the spice level by varying the amount of red curry paste.