Recipe Green Pea Soup

1. Separate and wash the lettuce leaves. Peel and finely dice the potatoes. Peel and mince the onion.
2. In a casserole dish, sweat the onion in the butter, then add the lettuce leaves, diced potatoes, stock cube and peas, and cover with 1.5L water.
3. Simmer for around ten minutes.
4. Blend the soup to achieve a smooth consistency using an immersion blender and let it simmer for 5 more minutes. Add salt and pepper to taste.
5. Immediately fill, seal, and heat-treat the jars for 1 hour at 100°C.

When it is time to serve, reheat, and add 300 ml of crème fraîche. Serve immediately.