Finely slice the onion. Peel and roughly cut the potato.
Heat 2 tablespoons of oil in a large saucepan and fry the onion for a few minutes, stirring occasionally with a wooden spoon.
Add the speck, and cook over medium heat for a few moments, stirring constantly. Add the potato, fry for 5 minutes so that everything tastes good, adding a little hot broth and stirring so that it does not stick. At this point add the peas. Pour the broth (keep a little aside to adjust the density at the end), then simmer for about 20/30 minutes until the vegetables are soft.
Season with salt and pepper.
Leave some peas aside, if you wish, and blend everything with an immersion mixer until you have reached a creamy and smooth consistency. Add the peas.
Depending on the desired consistency, add the broth kept aside, then pour your soup into the bowls.
Garnish and serve immediately.