or rabbis, the first question is: Is it kosher? Certainly, there are many Jewish legal hurdles test-tube meat would have to clear before a definitive answer could be reached. A central point of debate is the origin of the cells, which some say would have to come from a kosher—that is, cloven-hoofed, cud-chewing—animal. “As a general principle, something derived from a nonkosher animal is not kosher,” says Rabbi Menachem Genack, head of the Orthodox Union’s Kosher Division.
Others, such as Rabbi Carl Feit, chair of the biology department at Yeshiva University, say cultured meat could still be kosher even if the donor animal isn’t. Feit points to the Jewish legal principle of nullification, which states that a trace amount of a forbidden substance can be fully absorbed into an acceptable one without rendering the second treif, or forbidden. If, for example, a piece of meat falls into a glass of milk, the milk is still considered kosher as long as the meat is not more than one-sixtieth of the mixture.
With cooler weather coming, experimentation is reasonable. the salt, NPR's food blog, has a piece by Anne Miller on some things to try. For what its worth I find refrigerating the dough for a day and using a very high quality chocolate chip is important. I using half butter/half shortening for the fat and use pasteurized eggs to sample the dough:-)
This is only a first step beyond simple heating. I've seen some amazing (and healthy) meals prepared in office settings with five minute time budgets. One person, at Stony Brook University, even produced a checkered table cloth, china and wine to add to his lunch experience.
Immersion circulators started at about $1,000 or were generally awful homemade contraptions until recently. Nomiku delivered a well thought-of unit funded by Kickstarter and now they have another project set to deliever an improved and less expensive version. I bit...
I've mentioned Doug Rouch's work with the Urban Food Initiative that makes use of good food that would otherwise be discarded. Here is a paper in JAMA Pediatrics that offers more commentary (outside their paywall)