Tasty Hungarian Mushroom Soup

Ingredients
2 tablespoons (40 g) unsalted butter
1 large onion, diced
1 ½ lb (650 g) mushrooms
3-4 garlic cloves, crushed
2 tablespoons Hungarian paprika
1 tablespoon dried dill
1 tablespoon tamari soy sauce
2 cups (500 ml) vegetable stock
1 cup (250 ml) almond milk
2 tablespoons almond flour
1 tablespoon lemon juice
½ cup (100 ml) sour cream
Salt and freshly ground black pepper to taste