I think the ingredient Silphium described in this dish (Now considered extinct) could be Sea Holly (Eryngium spp). Its highly debated as many authors think it is some extinct variety of fennel, but from the images on the coins it doesnt look like a Fennel.

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dr_dshiv 5 hours ago | parent | next [-]

Or Ferula drudeana https://en.wikipedia.org/wiki/Ferula_drudeana

	▲	pankajdoharey 5 hours ago \| parent [-]
		Could be but the central bulb as made on the coins is unlike a fennel https://en.wikipedia.org/wiki/Silphium , and since this imaginary recipe is a part of a comedy it is unlikely to be edible. If you look at other ingredients they can surely make someone sick.

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ithkuil 5 hours ago | parent | prev [-]

I believe there are more descriptions of it other than rough depictions on coins