Cream of Mushroom Soup

Ingredients

• a drizzle of olive oil
• 1/4 cup butter
• 1 small onion, finely chopped
• 1-2 garlic cloves, crushed
• 2-3 cups sliced mushrooms—any kind
• a few sprigs of fresh thyme
• 2 Tbsp all-purpose flour
• a splash of sherry or white wine (optional)
• 3-4 cups (or a 1L container) chicken or vegetable stock
• salt
• pepper
• 1/2-1 cup cream (heavy or half and half)