In a small bowl combine all sauce ingredients; pour into a small round baking dish. Set aside.
Bun Dough
In a bowl, combine water , yeast & sugar. Allow to proof for 5 minutes. Add oil, flour, salt & egg. With a fork or a wooden spoon, mix into a shaggy dough.
Turn dough out onto a floured surface & knead for 5 minutes.
Divide the dough into 4 equal pieces & shape into balls. Place balls on top of sour cream sauce mixture in small round baking dish, cover with a towel & let rise for 40 minutes.
Preheat oven to 350 F.
Bake for about 20-25 minutes. Remove from oven & immediately invert pan over a serving platter. Be VERY CAREFUL that the HOT sauce does not burn your hands when inverting the pan.