Green bean and lemongrass noodle soup

Ingredients

• 3 1/2 oz green beans
• 1 stalk lemongrass
• 5.3 oz rice noodles
• 1 eggplant
• 2 tsp salt
• 1 chili
• 2 shallots
• 1/2 oz ginger
• 2 cloves garlic
• 1/3 oz ground turmeric
• 1 3/4 oz cilantro
• 4 tbsp coconut oil
• 1 lime
• 1 cup coconut milk
• 1 cup vegetable broth
• 3/4 cup water
• 2 tsp brown sugar
• 2 tsp fish sauce
• salt
• mint (for serving)