Yeasted Meringue Coffee Cake

Yeasted Meringue Coffee Cake (from the Daring Bakers site)
Makes 2 round coffee cakes, each approximately 10 inches in diameter. The recipe can easily be halved to make one round coffee cake.

Note: I made half of the recipe, but chose to make a crescent shape because that's what I could accomplish in my toaster oven.
For the yeast coffee cake dough

4 c (600 g / 1.5 lbs.) flour
1/4 c (55 g / 2 oz.) sugar
3/4 tsp (5 g / 1/4 oz.) salt
1 package (2+1/4 tsp / 7 g / less than an ounce) active dried yeast
3/4 c (180 ml / 6 fl. oz.) whole milk
1/4 c (60 ml / 2 fl. oz. water (doesn’t matter what temperature)
1/2 c (135 g / 4.75 oz.) unsalted butter at room temperature
2 large eggs at room temperature
Note: I added 2 tsp dried orange zest to my dough as well, just to give it a fresh citrus flavor.

1. In a large mixing bowl, combine 1+1/2 c (230 g) of the flour, the sugar, salt and yeast.
2. In a saucepan, combine the milk, water and butter and heat over
   medium heat until warm and the butter is just melted.
3. With an electric mixer on low speed, gradually add the warm liquid to
   the flour/yeast mixture, beating until well blended. Increase mixer
   speed to medium and beat 2 minutes.
4. Add the eggs and 1 cup (150 g) flour
   and beat for 2 more minutes.
5. Using a wooden spoon, stir in enough of the remaining flour to make a dough that holds together.
6. Turn out onto a floured surface (use any of the 1+1/2 cups of flour remaining) and knead the dough for 8 to 10
   minutes until the dough is soft, smooth, and elastic, keeping the
   work surface floured and adding extra flour as needed.
7. Place the dough in a lightly greased (I use vegetable oil) bowl, turning to coat all sides. Cover the bowl with plastic wrap and a kitchen towel and let rise until double in bulk, 45 – 60 minutes. The rising time will depend on the type of yeast you use, and how fresh it is. 

While the dough is rising, prepare your filling. In my coffee cake, I used a combination of chopped spiced almonds, dried sweet cherries, and unsweetened coconut flakes.

Once the dough has doubled, make the meringue.

Meringue
3 large egg whites at room temperature
1/4 tsp salt
1/2 tsp vanilla
1/2 c (110 g / 4 oz.) sugar

1. 
In a clean mixing bowl – ideally a plastic or metal bowl so the egg whites adhere to the side (they slip on glass) – beat the egg whites with the salt, first on low speed for 30 seconds, then increase to high and continue beating until foamy and opaque.
2. Add the vanilla then start adding the 1/2 cup sugar, a tablespoon at a time as you beat, until very stiff, glossy peaks form.

Assemble the Coffee Cakes:

1. Line 2 baking/cookie sheets with parchment paper.
2. Punch down the dough and divide in half. On a lightly floured surface, working one piece of the dough at a time (keep the other half of the dough wrapped in plastic), roll out the dough into a 20 x 10-inch (about 51 x 25 ½ cm) rectangle.
3. Spread half of the meringue evenly over the rectangle up to about 1/2-inch (3/4 cm) from the edges.
4. Sprinkle half of your filling of choice evenly over the meringue (ex: half of the cinnamon-sugar followed by half the chopped nuts and half of the chocolate chips/chopped chocolate).
5. Now, roll up the dough jellyroll style, from the long side. Pinch the seam closed to seal.
6. Very carefully transfer the filled log to one of the lined cookie sheets, seam side down.
7. Bring the ends of the log around and seal the ends together, forming a ring, tucking one end into the other and pinching to seal.
8. Using kitchen scissors or a sharp knife (although scissors are easier), make cuts along the outside edge at 1-inch (2 ½ cm) intervals. Make them as shallow or as deep as desired but don’t be afraid to cut deep into the ring.
9. Repeat with the remaining dough, meringue and fillings.
10. Cover the 2 coffee cakes with plastic wrap and allow them to rise again for 45 to 60 minutes.
11. Preheat the oven to 350°F (180°C).
12. Brush the tops of the coffee cakes with the egg wash.
13. Bake in the preheated oven for 25 to 30 minutes until risen and golden brown.

The dough should sound hollow when tapped.
Remove from the oven and slide the parchment paper off the cookie sheets onto the table. Very gently loosen the coffee cakes from the paper with a large spatula and carefully slide the cakes off onto cooling racks. Allow to cool.
Just before serving, dust the tops of the coffee cakes with confectioner’s sugar as well as cocoa powder if using chocolate in the filling. These are best eaten fresh, the same day or the next day.