01 - Melt two tablespoons of unsalted butter in a large saucepan over medium heat. Add the finely chopped onion and sauté for 3 to 4 minutes until softened but not browned.
02 - Add the minced garlic and cook for 1 minute, stirring continuously to release its aroma.
03 - Stir in the green peas and vegetable stock. Bring the mixture to a gentle boil, then reduce the heat to a simmer. Cook for 8 to 10 minutes, or until the peas are tender.
04 - Remove the saucepan from the heat and stir in the fresh mint leaves.
05 - Carefully blend the soup using a stick blender directly in the saucepan, or in batches in a countertop blender, until completely smooth.
06 - Return the blended soup to the pan. If using, stir in the cream or crème fraîche. Season generously with salt and freshly ground black pepper to taste. Gently reheat the soup if necessary, ensuring it does not boil.
07 - Ladle the hot soup into individual bowls. Garnish with additional fresh mint leaves and a swirl of cream, if desired. Serve immediately.