Wash the potatoes, bring to the boil covered with water and cook for about 20 minutes. Clean, wash and cut the sugar snap peas into strips and cook with the peas for 4 minutes in boiling salted water. Drain on a sieve. Peel and finely chop the onion. Cut the smoked pork loin into small cubes.
Heat the fat in a saucepan. Sauté the smoked pork and onion in it. Add flour. Deglaze with broth and milk while stirring and bring to the boil. Season to taste with salt and pepper. Drain potatoes, rinse, peel and slice. Add potatoes, mangetout and peas to the sauce. Flavour again with salt and pepper. Wash the chives and cut into small rolls.
Season to taste with salt and pepper. Drain potatoes, rinse, peel and slice. Add potatoes, mangetout and peas to the sauce. Flavour again with salt and pepper. Wash the chives and cut into small rolls. Sprinkle on the béchamel potatoes and serve