Thai Green Vegetable Soup

Name: Thai Green Vegetable Soup
Ingredients: 2 cups cubed vegetables (broad beans, bottle gourd, green papaya, french beans, carrots, radish & onion); 1/2 cup green peas; 1 tbsp. olive oil; 1 galangal, sliced; 1 fresh chilli, slit; 2 tbsp. Thai green curry paste (store bought); 3 cups vegetable stock / water; 8-10 kaffir lime leaves; 1 lemongrass stalk, cut into 3 pieces; 1/2 cup thick coconut milk; to taste salt; 1/2 pepper powder or to taste; as required coriander leaves, lime leaves & fresh chilies to garnish