Chocolate Cherry breakfast buns

Name: Chocolate Cherry breakfast buns
Ingredients: Dough:; 4 large egg yolks; 1 large whole egg; 1/2 cup (100 gr.) granulated sugar; 6 tablespoons (85 gr.) butter, melted; 3/4 cup (175 ml) buttermilk or milk; Zest of 1/2 orange, finely grated; 3 3/4 cups (480 gr.) all-purpose flour; 2 1/4 teaspoons (7 gr.) instant dry yeast; 1 1/4 teaspoons coarse or kosher salt; 1 teaspoon oil for bowl; Filling & Icing:; 1 cup (200 gr) cherries chocolate preserve; 20-25 pitted cherries; 3 tablespoons (50 ml) orange juice; 1 1/2 (180 gr.) powdered sugar