Sayyidah Salma (may Allah be pleased with her) said: I went to Hasan bin Ali, Abdullah bin Ja'far and Abdullah bin Abbas (may Allah be pleased with them), and they said: Describe to us the food that the Prophet (peace and blessings be upon him) liked. I said: My sons, in that case you would not desire it today. So I got up, took barley, ground it and cleaned it, and made bread from it; its accompaniment was olive oil, and I sprinkled black pepper over it. Then I presented it to them and said: The Prophet (peace and blessings be upon him) liked this.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21129