Thai red curry soup

Name: Thai red curry soup
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: Asian, Thai
Ingredients: 1 tbsp vegetable oil; 1 medium brown onion, chopped; 2 tbsp Thai red curry paste; 500g chicken thigh fillets, trimmed, chopped; 4 cups Massel chicken style liquid stock; 300g broccoli, cut into small florets; 100g green beans, trimmed, chopped; 410g can baby corn, drained, thinly sliced diagonally; 400ml can coconut milk; 1 tbsp fish sauce; Fresh coriander sprigs, to serve; Lime wedges, to serve