Beef Paprikas Recipe - Authentic Hungarian Dish

Ingredients

• 4 tbsp unsalted butter
• 2 large onions , chopped
• 1 large green bell pepper , chopped
• 1 lb (454 g) mushrooms , sliced
• 2 tbsp all-purpose flour
• 1.5 tbsp paprika , preferably Hungarian sweet
• 2.5 cups beef stock or canned unsalted broth
• 1 tbsp tomato paste
• 0.75 cup sour cream
• 3 tbsp chopped fresh dill
• 1.75 lb (794 g) center-cut beef tenderloin , cut into 0.25 to 0.5 inch thick slices, halved lengthwise
• 0.25 cup dry white wine
• chopped tomatoes (optional)