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: 18.40 gm vegetable oil; 1 medium brown onion, chopped; 56.00 gm Thai red curry paste; 500g chicken thigh fillets, trimmed, chopped; 1020.00 gm chicken stock; 300g broccoli, cut into small florets; 100g green beans, trimmed, chopped; 410g can baby corn, drained, thinly sliced diagonally; 400ml can coconut milk; 24.40 gm fish sauce; Fresh coriander sprigs, to serve; Lime wedges, to serve