Preheat your oven to 200 degrees. Once heated, turn it off. This will be where you let your buns rise.
In a medium bowl, mix together the dry ingredients - the cornstarch, oat flour, rice flour, xantham gum, salt and yeast. Gently open the probiotic capsules and stir the powder inside into the mixture.
In a microwave safe, measuring cup, heat the water, agave, almond milk and butter until it reaches 110-120 degrees F. You don’t want it hotter than that or it will kill the yeast. Add the mixture into the bowl with the flour, along with the yogurt and applesauce. Stir until the yogurt is well mixed and the dough is soft, and pretty sticky.
Turn the dough out onto a lightly floured surface (I use cornstarch) and knead for 3-4 minutes, until it just comes together. You'll need to keep adding cornstarch to the surface, a little at a time, so the dough doesn't stick. Don't knead too long, or they won't be as fluffy! Spray the bowl that it was in with cooking spray and place it back inside to let it rest for 10 minutes.
Once the dough has rested, roll it on a lightly floured surface to a 14x8 inch rectangle. Spread the butter from the filling all over it.
In a small bowl, mix together the coconut sugar, monkfruit and cinnamon. Spread all over the dough using your fingers to really rub it in.
TIGHTLY roll the dough up and cut into 11 bigger buns, or 12 smaller. You can use a very sharp knife or, my favorite, dental floss. Just slide the floss under the dough, and then cross each side over top of each other at the top of the roll and pull down to make a smooth slice.
Spray a 9 inch circular baking dish (I used a pie dish) with cooking spray and place the rolls inside. Cover lightly with tinfoil and let the buns rise in the heated oven for 90 minutes.
Once risen, remove the buns from the oven and heat the oven to 375°. Bake the rolls for 20-22 minutes, until lightly golden brown. Then, lightly cover with tinfoil to prevent too much browning, and bake for an additional 6-10 minutes.
While the buns bake, whisk together the softened cream cheese, vanilla, powdered sugar and almond milk until smooth.
Pour the glaze over the buns and serve immediately!