Cheese Rolls with Buttery Parmesan Crust

Originally from King Arthur Flour Baker's Companion. FYI - I used part whole-wheat flour on these.

Ingredients:
Dough -
4 1/2 teaspoons instant yeast
1/2 cup warm water
1 cup lukewarm milk
1 large egg, lightly beaten
1/4 cup butter, softened
1/3 cup sugar
1 teaspoon salt
5-6 cups unbleached all-purpose flour

Filling -
8 ounces cheddar or pepperjack cheese, cut into 15 cubes

Topping -
2 tablespoons butter
1/4 cup Italian-flavored bread crumbs
1/4 cup grated parmesan cheese
1 egg yolk beaten with 1 tablespoon water

Directions:
1. For the dough, combine all the ingredients and mix and knead until you have a soft, elastic dough (don't add too much flour - the key to soft dinner rolls is a soft dough!).
2. Place the dough in a lightly greased bowl and cover, letting rise in a warm place for 20-30 minutes.
3. Prepare a 9X13-inch pan by lightly greasing the bottom and sides with butter or nonstick cooking spray.
4. Deflate the dough and divide into 15 pieces.
5. Shape the pieces of dough into rounds and punch a cube of cheese from the bottom up into the center of each piece.
6. Pinch the dough tightly together to close the bottom.
7. Place the rolls, pinched side down, in the prepared baking pan.
8. Cover and let rise again for another 15 to 20 minutes, or until nearly doubled.
9. While the rolls are rising, melt the butter and stir in bread crumbs and parmesan cheese. Set aside.
10. Preheat the oven to 375 degrees.
11. When the rolls have risen, brush the tops with the egg yolk beaten with water.
12. Sprinkle tops of rolls liberally with the bread crumb mixture.
13. Bake for 15 to 18 minutes, until the tops of the rolls are nicely browned.
14. Remove from the pan immediately and cool on a rack. Serve warm.