Can I make this soup ahead of time?
Yes. Roast and blend the soup up to 2 days ahead, then reheat gently on the stovetop. Add the herbed cheese just before serving for best texture.
What can I substitute for Boursin cheese?
Use cream cheese mixed with fresh herbs (dill, parsley, chives), or any soft herbed cheese like chèvre. Adjust seasoning to taste.
Why roast the garlic whole with the top sliced off?
Roasting the whole head mellows the garlic's sharpness and makes it spreadable and sweet. Slicing the top exposes the cloves to heat and makes squeezing easier.
Can I freeze this soup?
Yes, freeze for up to 3 months in airtight containers. Thaw overnight in the refrigerator and reheat on the stovetop, stirring in a splash of broth or cream if needed.
How thick should the soup be?
Blend until completely smooth. The soup will thicken slightly as it cools; add vegetable broth or cream during reheating to reach your preferred consistency.