Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 2 days. Reheat gently with a splash of water or milk to restore creaminess.
Substitutions: If fresh boletus are unavailable, other firm mushrooms like shiitake or porcini can be used. Frozen blueberries work well if fresh are out of season, but thaw and drain them first to avoid excess water.
Tips: Keep the bouillon warm throughout the cooking process to maintain the temperature of the risotto. The key to good risotto is patience and constant stirring.