Hungarian Mushroom Soup

Name: Hungarian Mushroom Soup
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: European, Eastern European
Ingredients: 500 gram portobellini mushrooms; 2 tbsp olive oil; 1 tbsp butter; 1 onion (finely chopped); 2 cloves garlic (minced); 1 teaspoon fresh thyme leaves; 2 tsp sweet paprika; 1 tbsp soy sauce; 2 tsp lemon juice; 1 tbsp cake wheat or all purpose flour; 1/2 cup milk; 1&1/2 cup vegetable stock; 1/3 cup sour cream; 2 tbsp chopped parsley