Cooking the Hen: In a large pot, cook the larded chicken in salted water until tender and crumbly. Once ready, remove from heat and let it cool.
Prepare the potatoes and carrots: While the chicken is cooling, peel the potatoes and carrots and cut them into small cubes. Then, place them in a pot with water and a little salt and cook until tender. Drain and let them cool.
Cooking the eggs: In another pot, boil the eggs until they are completely cooked. Then peel them and cut them into slices or cubes, reserving some to decorate the salad.
Prepare the rest of the ingredients: Cut the green apple into small cubes and finely chop the cabbage.
Mix the ingredients: In a large bowl, combine the shredded chicken, potatoes, carrots, eggs, green apple, cabbage and green peas. Make sure all ingredients are well mixed.
Prepare the dressing: In a separate bowl, mix the mayonnaise, mustard, olive oil, vinegar, salt and pepper. Whisk well until smooth.
Dress the salad: Pour the dressing over the mixed ingredients and toss gently until everything is evenly coated.
Refrigerate and serve: Cover the container with plastic wrap and refrigerate the salad for at least one hour to allow the flavors to blend and intensify. Then serve chilled and garnish with reserved egg slices.