Thai rice noodle salad

Name: Thai rice noodle salad
Ingredients: ½ a 250g pack fine vermicelli rice noodles; 200g bag beansprouts; zest and juice 2 limes; 2-3 tbsp fish or soy sauce, to taste; 1 tsp muscovado sugar or soft brown sugar; 1 red onion, halved and thinly sliced; 2 Little Gem lettuce hearts, leaves separated and roughly torn; 500g minced pork; small knob grated ginger; pinch cayenne pepper; 1 tsp sunflower oil; 2 tbsp sesame seeds; 1 tsp oil; 4 x 175g sirloin steaks; 1 deseeded and shredded red chilli