Preheat oven to 375ºF
Line a baking sheet with foil and grease; set aside
Season chicken breasts with pepper and salt on both sides; set aside.
In a shallow dish or bowl, mix together egg and lemon juice.
In a large re-sealable plastic bag, mix together flour, garlic powder and hot paprika.
Dip chicken breasts in flour, then egg mixture, and then flour mixture again.
In a large skillet over medium heat, add clarified butter. When it gets hot, add garlic and sauté for 1 minute. Add chicken breasts and cook until golden, about 2 minutes per side.
Place the chicken breasts to the prepared baking sheet and transfer to the preheated oven; cook for about 8 minutes.
Meanwhile, return the skillet to the burner. Add mushrooms and hot sauce; sauté for 2 minutes.
In a medium bowl, mix together broth, wine and lemon juice mixture; pour mixture into the skillet. Increase the heat to medium-high and cook for 3 minutes.
Add sour cream and reduce the heat to medium low; simmer for about 8 minutes.
Remove the chicken breasts from the oven and let them rest.
Add dill and freshly ground black pepper to the sauce. Add cornstarch mixture and stir until it thickens, about 45 seconds.
Place the chicken on warm serving plates and drizzle the sauce over. Garnish with fresh lemon slices and parsley sprigs. Serve it with a side of pasta.