Parashas Bo · Shemos 12:9 · TT note 15
Torah Temimah on Shemos 12:9, note 15 (on צְלִי אֵשׁ) points to Pesachim 41a.
Sefaria — Exodus 12:9
Sefaria — Torah Temimah on Exodus 12:9
Sefaria — Pesachim 41a
E-Daf — Pesachim 41a
English: “Roasted with fire” — and not pot-roasted [cooked in a pot without added water, only in its own juices, which is still a form of cooking].
Exclusionary derash of אֵשׁ: heat without open fire (pot-roast) is invalid.
The Pesach must be roasted by fire, not cooked in a pot in its own juices.