Fry bacon and discard bacon fat leaving 1 tbsp of fat in the pan. Add chopped mushroom stems and onion, season with salt and pepper and add oregano. Cook until onion is tender and the water from mushrooms stems, if any, has completely evaporated.
In a bowl add cream cheese, chopped bacon, hot sauce, mushroom stem mixture, bread crumbs, chives and mix well.
Stuff each mushroom evenly with the mixture and place on a baking pan.
Bake for 10 to 15 minutes or until top is crisp.
Please keep in mind that nutritional information is a rough estimate and can vary greatly based on products used.