Stuffed Chicken - With legumes

Four Deboned Chicken legs, washed with Salted Water and vinegar, Salt and pepper. Stuffing: 6 Oz Mushroom, 4 Oz Onion, 1 Oz Butter, and ½ Clove Garlic, Papri...

6 tablespoons cold butter 2 cups all-purpose flour 1/2 teaspoon salt 1/3 cup water, or more as needed 3 skinless, boneless chicken breast halves 1 cup[...]