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Pre-op: Watercress, pea and edamame bean and mint soup 

Looking for a light yet nutritious meal to enjoy before your bariatric surgery? This refreshing watercress, pea, edamame bean, and mint soup is perfect for your pre-op diet. It’s packed with vitamins, minerals, and a touch of protein to keep you nourished and satisfied.

(vegetarian and vegan) 

This recipe makes a full batch which can then be frozen into portions. It is crucial to weigh/measure all ingredient using digital kitchen scales to ensure you consume the appropriate amount of nutrients.  

Please note these recipes are as part of our pre-operative diet guidance. These diets should only be used before surgery, as advised by your dietician and should not be used for general weight loss or for after surgery.  


Half-batch contains: 

  • A maximum of 600kcals.  
  • A minimum of 37g protein.  
  • A maximum of 52g carbohydrate.  



  • 200g spring onions, sliced 
  • 400g frozen peas 
  • 1 litre vegetable stock made with 1 cube 
  • 150g watercress 
  • 600g spinach 
  • 300ml soy milk unsweetened 
  • 1tsbp chopped fresh or dried mint 
  • Pinch of nutmeg and black pepper to taste 



  1. Put the spring onions into a saucepan with the beans, peas and stock.  
  2. Bring to the boil, then reduce the heat and simmer for 10 minutes, covered.  
  3. Add the watercress and spinach. Cook for 2-3 minutes until the leaves have wilted. Remove from the heat.  
  4. Add the soya milk and mint and blend until smooth or leave some chunks*.  
  5. Place back on stove to heat through gently, season with nutmeg/pepper as desired.  


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