2 lbs. Idaho potatoes, peeled & cut into chunks
1/2 Tbsp extra-virgin olive oil
4 slices bacon or peppered bacon, chopped
2 lbs. ground sirloin
1 onion, chopped
1/2 lb. button mushrooms, quartered
2 Tbsp. butter
2 Tbsp. all-purpose flour
1 1/2 cups beef stock
2 Tbsp. Worcestershire sauce
1 egg yolk
3 Tbsp. sour cream
1/2 lb. blue cheese, crumbled
3 to 4 Tbsp. chives
1 tsp paprika
Heat a skillet with high sides over medium high heat. Add olive oil, half a turn of the pan and the bacon. Crisp bacon.
Remove to a paper towel line plate.
Add sirloin to the pan and caramelize the meat, 4 to 5 minutes.
Add in the mushrooms and onions and cook until tender, 6 to 7 minutes more; then season with salt and pepper.