Bao burgers

Ingredients

• 250 g white flour
• ¼ tsp salt
• 1 ½ tbsp sugar
• 1 ½ tsp dry yeast
• ½ tsp sodium bicarbonate
• 50 g butter
• 1 ¼ dl lukewarm water
• ½ tsp lemon juice
• 1 tomato (approx. 250 g), in cubes
• ½ dl chicken bouillon
• 3 tbsp soy sauce
• ½ tbsp oyster sauce
• 1 garlic clove
• 1 ½ tsp sugar
• 1 tsp hot paprika
• ¼ tsp chilli powder
• 1 tbsp peanut oil
• 400 g chicken breasts
• ¼ papaya
• 100 g celery
• ½ bunch coriander