Boil and eat the Passover meal at the place that the LORD your God will choose. In the morning you may go back to your tents. Deuteronomy 16:7

Do not eat any of the meat raw or boiled in waters or boiled at all, but only roasted over the fire—its head and legs and inner parts. Exodus 12:9

So they boiled the Passover animals on the fire according to the ordinance, and they boiled the holy things in pots, in kettles, in pans, and carried them speedily to all the lay people. 2 Chronicles 35:13

ex. http://contradictionsinthebible.com/roasted-or-boiled/

ref:

• http://www.bibleinsight.com/passovr2.html
• https://booksnthoughts.com/why-was-the-first-passover-different-from-all-other-passovers/
• https://hermeneutics.stackexchange.com/questions/13713/was-the-passover-meal-to-be-boiled-according-to-deuteronomy-165-7

“And they roasted the passover with fire according to the ordinance: but the other holy offerings sod they in pots, and in caldrons, and in pans, and divided them speedily among all the people.” (2 Chronicles 35:15)