Vietnamese Pho soup with brisket and noodles

Name: Vietnamese Pho soup with brisket and noodles
Ingredients: 750g brisket; 500g chicken bones; 250ml vegetable oil; 2 red onions, peeled and sliced; 1 tsp salt; 5 spring onions; 3 cloves garlic, roughly sliced; 2 knobs ginger, sliced; 2 cinnamon sticks; 5 star anise; 3 tsp coriander seeds; 1-2 tbsp fish sauce; 1 tbsp grated palm sugar (if unavailable use ½ tbsp ordinary sugar); 1 packet rice noodles; juice of 1 lime or lemon