Vegetarian rice paper rolls

2 carrots, peeled and cut into matchsticks
1 large avocado, cut into slices
Spring onions, cleaned and cut into matchsticks
Fresh herbs (chives, coriander or mint)
1 ounce cooked rice noodles/rice vermicelli (optional)
Rice paper wrappers
Fried tofu, sliced
1 tbsp Sriracha sauce
1 tbsp brown sugar
1 tbsp soy sauce
2 tbsp rice flour
Vegetable oil