Sayyiduna Anas (may Allah be pleased with him) says: The Prophet (peace and blessings be upon him) said: Perform ablution after (eating) something cooked on fire!
Al-Bazzar recorded it; its chain contains a narrator, Hajjaj bin Nusayr, whom Abu Hatim and others declared da'if (weak), while Yahya bin Ma'in and Ibn Hibban declared him thiqah (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1296