In the past years, I wrote to you that lentils are a good food before the fast as they keep blood sugar levels stable
Chumus which “warms up” the body is likely not a good idea [interesting that the word chumus has the root chom [heat] in it!
In general, the darker a food is the more it may be heat-producing and the greener the more cooling it may be. The Hebrew language gives beautiful hints to this
Yerek [vegetable] has the word kar [cold] in the word. [yarok is green in Hebrew
An extreme cooling food is cucumber,
You may greatly benefit from the suggestions of Rabbi Lazer Brody!