Rice paper spring rolls with peanut sauce

• 1 medium size red onion, finely chopped
• 50gr vermicelli noodles
• 1 tsp sesame oil
• 1 tsp salt
• 1/2 cup red cabbage, thinly sliced
• 1 carrot, thinly sliced
• 2 cucumbers thinly sliced
• 2 jalapeño peppers cut in small pieces
• 1/4 cup fresh coriander, finely chopped
• 1/4 cup fresh mint, finely chopped
• 8 rice paper sheets (for spring rolls)

For the peanut sauce:

• 1/3 cup smooth peanut butter
• 2 tbsp rice vinegar
• 2 tbsp soy sauce
• 2 tbsp honey
• 1 tbsp sesame oil
• 2 tbsp water