Either bake them right away or let them chill in the fridge overnight so they're ready to hop in the oven in the morning.
1 package (2.25 tsp) active dry yeast
1/2 cup warm water (105-115 F)
1/4 cup sugar
1/2 cup whole milk
1/4 cup butter
1 egg yolk, room temperature
1 1/2 tsp vanilla extract
1/4 cup vital wheat gluten or gluten flour
14 to 16 ounces (3 1/2 to 3 3/4 cups) whole wheat pastry flour
1/2 tsp freshly grated nutmeg
1/2 tsp salt
Filling:
1/2 cup butter, room temperature
1/3 cup sugar, sucanat or light brown sugar
2 Tbsp freshly ground cinnamon
Frosting:
4 oz Neufchatel or cream cheese, softened
1 cup powdered sugar
1 tsp vanilla extractWarm a large mixing bowl with hot water. Then place the water, yeast and a pinch of sugar in it and allow to sit until foamy (5 to 7 minutes). In a small saucepan warm milk and butter to 105 - 115 F. Add the warmed milk and butter along with the remaining sugar and egg yolk and vanilla to the mix. Add the wheat gluten and then the flour a little (about a cup) at a time (only add the last 2 ounces [1/4 cup] if the dough is too sticky); add nutmeg and salt. If using a dough hook continue to knead for 5 minutes (or until dough clears the sides of the bowl) or about 10 minutes if by hand. Dough should be firm, soft and spring back when gently pressed. Take care not to over knead or your buns will be tough. Place the dough in a buttered bowl, cover with a towel and let rise in a warm spot (If your kitchen is as cold as mine this time of year, place in oven that is turned off with just the pilot light or on the top shelf with a pan of steaming water on a lower shelf.) until the dough has doubled in size (1.5 to 2 hours).
In a large bowl, beat the butter, brown sugar and cinnamon until fluffy. Turn the dough onto a lightly floured surface. Press or roll dough to approximately 17"x14". Spread the filling to all edges, leaving a 1/2 inch border on one side. Roll the filling covered dough starting opposite the empty border, dampen the edges with water and rub to seal the seam. Stretch the roll to approximately 22"x3". Use a serrated knife to cut the dough into 12 slice and place, evenly spaced on a large (14x7) parchment lined baking sheet, individually in lined muffin tins or in round cake or pie pans. My preference is a cake or pie pan because the buns stay softer when they they bake snuggled together and are surrounded on all sides by the pan edges.
At this point you need to decide if you'd like to bake them now or later.
Now: Preheat oven to 325F. Cover buns with a towel and place in a warm spot for about 45 minutes, until puffy. Bake for about 30 minutes, until lightly browned or internal thermometer reads 190F.
Later: Cover buns loosely with plastic and refrigerate overnight (up to 16 hours). In the morning, remove the buns from the frige and place in an oven that is turned off. Fill a shallow pan 2/3-full of boiling water and set on the rack below the rolls. Close the oven door and let the rolls rise until they look puffy; approximately 30 minutes. Remove the rolls and the pan of water from the oven. Then preheat oven to 325F. When it's hot, bake buns for about 30 minutes, until lightly browned or internal thermometer reads 190F.
In a medium bowl, beat cream cheese, sugar and vanilla until smooth. Remove buns from oven and allow to cool only slightly (about 5 minutes) before frosting. Or, better yet, serve the buns super warm and have the frosting on the side so everyone can top them as they like.