Vegetable Macedonia - Traditional Recipe with Mayonnaise

I propose to make the traditional recipe for vegetable Macedonia. This Macedonia is composed of carrots, potatoes, turnips, green beans, and peas. For the sauce, I make mayonnaise. In this recipe, I made a light sauce with cottage cheese.
Ingredients:
For the vegetables
2 carrots
2 potatoes
1 large turnip
100 grams of green beans (fresh if possible)
100 grams of peas (fresh if possible)
Coarse salt for cooking
For the sauce
1 egg yolk
100 milliliters of sunflower oil
1 teaspoon of mustard
3 tablespoons of vinegar
2 tablespoons of cottage cheese (for a lighter version)
Salt and pepper