Making guacamole on Shabbos

Hi,

May I prepare guacamole on Shabbos, mashing avocado and mixing it with lime juice and spices?

One of the forbidden melachos of Shabbos is tochein, which involves breaking a solid material into small particles. There is some debate as to whether this occurs when mashing soft entities which will stick together afterward. Therefore, one should do this right before eating the food, since many authorities rule that tochein not relevant when one eats the food soon afterward. Ideally, one should mash the avocado with an unusual implement, such as the handle of a fork.

One may squeeze lime juice directly into the avocado without concern for the melachah of sechitah (squeezing liquid from certain solids). One may then mix the juice into the mashed avocado without concern for the melachah of lishah (sticking small items together, to form a dough-like entity) ; the liquid does not cause the particles of avocado to stick together. Even were the spices to stick together, this would not constitute lishah.

(Mishneh Berurah 320:22, 321:45; Chazon Ish Orach Chaim 57, 58:9; Igrot Moshe Orach Chaim 4:74:Tochein 2; Shemirat Shabbat k'Hilchatah 8:19-20, 8:footnote 81)

Have a great day,
Mordechai