Hungarian Mushroom Soup (Gombaleves)

Ingredients

• 400 g mushrooms (sliced)
• 1 small onion (chopped)
• 2 tbsp butter or oil
• 1 tbsp Hungarian paprika
• 1 tbsp flour
• 1 tsp salt
• ½ tsp black pepper
• 1 tsp dried dill (or fresh)
• 1 tbsp soy sauce (optional, for depth)
• 800 ml vegetable or chicken broth
• 150 g sour cream
• 1 tbsp lemon juice
• fresh parsley