Sour Cream Dinner Rolls

Name: Sour Cream Dinner Rolls
Ingredients: ½ cup potato flakes (see note below), or 2/3 cup mashed potato; ¾ cup sour cream (not light, and at room temperature); 1 egg; 3 tablespoon melted butter (cooled); 1 tablespoon honey; 1 teaspoon salt; ½ cup toasted wheat germ; 1 ¼ cup bread flour; 1 ¼ cup all-purpose flour + up to another 2 - 3 tablespoons for kneading; 2/3 cup barley flour; ¼ teaspoon baking soda; 1 ¾ teaspoon active dry yeast; Butter for greasing the pan; For the egg wash: 1 egg