Shama-il Tirmidhi Chapter 25, Hadith Number 27 (169).

Hazrat Salma radiyallahu anha says that Hazrat Hasan, Hazrat Abdullah ibn Abbas and Hazrat Abdullah ibn Ja’far Sadiq radiyallahu anhum came to her and said, Cook for us the food that Rasoolullah sallallahu alaihe wasallam liked and ate with pleasure. She replied, O’ my children, you will not like it now. (It was only liked in times of hardships.) They replied, Of course, we will surely like it. She got up and took a bit of barley, (crushed it) and put it in a pot, and poured a little olive oil over it, then crushed some chillies and spices and added it to the pot and served it, saying, This is what Rasoolullah sallallahu alaihe wasallam loved (and ate with pleasure).