Boil the peas in water with bay leaves for about 45 minutes until tender.
Add more water if the peas are about to burn.
Remove the bay leaves.
Blend the peas into a purée.
Peel onions, carrots, and cut into small cubes, clean leeks and cut into rings, and rinse thyme.
Add pearl onions or chopped onions, carrot cubes, leek rings, and thyme leaves to the yellow peas and bring to a boil.
Thin with the cooking water from the cured pork to the desired consistency.
Peel potatoes and cut into small cubes.
Boil the potato cubes in unsalted water in another pot.
Boil for about 15 minutes until they are almost tender.
Drain the water and add the potatoes to the yellow peas.
Season the yellow peas with salt and pepper.