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The Torah Learning Library of Yeshivat Chovevei Torah

Category: Food & Kashrut

Playing God: The Theology of Genetic Engineering

by Rabbi Haggai ResnikoffPosted on May 12, 2017

  How do the Torah and rabbinic sources view the idea of genetic engineering, specifically as it relates to plants? The following sources are meant to prompt a discussion regarding this question. 1. VaYikra 19:19 אֶֽת־חֻקֹּתַי֮ תִּשְׁמֹרוּ֒ בְּהֶמְתְּךָ֙ לֹא־תַרְבִּ֣יעַ כִּלְאַ֔יִם שָׂדְךָ֖ לֹא־תִזְרַ֣ע כִּלְאָ֑יִם וּבֶ֤גֶד כִּלְאַ֙יִם֙ שַֽׁעַטְנֵ֔ז לֹ֥א יַעֲלֶ֖ה עָלֶֽיךָ׃ You shall observe My laws.…

Eating the Placenta: A Halakhic Option?

Rabbi Dov Linzer (Posted on March 22, 2017)
From the Lindenbaum Center for Halakhic Studies

Further on Waiting Times After Eating Parmesan Pizza

Rabbi Ysoscher Katz (Posted on January 5, 2017)
From the Lindenbaum Center for Halakhic Studies

Meat After Parmesan On Pizza

Amy Pollak (Posted on December 8, 2016)
From the Lindenbaum Center for Halakhic Studies

Composting Within An Eruv

Amy Pollak (Posted on November 23, 2016)
From the Lindenbaum Center for Halakhic Studies

Buying Non-Kosher Food

Rabbi Dov Linzer (Posted on August 5, 2016)
From the Lindenbaum Center for Halakhic Studies

Snow for Tvillat Keilim

Rabbi Dov Linzer (Posted on July 26, 2016)
From the Lindenbaum Center for Halakhic Studies

Roast Marinated in Wine

Rabbi Dov Linzer (Posted on July 26, 2016)
From the Lindenbaum Center for Halakhic Studies

Mesechet Menachot: The Taxonomy of the Gemara’s Grains

by Rabbi Dov LinzerPosted on May 20, 2011

The Mishna of Menachot 70a lists the five species of grain.  These species are of central importance in many halakhot.  Only bread made from these species of grains is considered bread, and gets the brakha of hamotzi.  Only matzah made from these grains is considered matzah, and can be used on the seder night.  …

Hilkhot Kashrut: Even Separated Foods Can be Treif

by Rabbi Dov LinzerPosted on March 25, 2011

Previously we saw that when a meat and milk are cooked together, they may remain forbidden even after they are separated.  This depends on whether we understand the prohibition of meat and milk to be based on the fact that they were cooked together, which does not change even after they are separated, or based on the fact that there is a mixture of tastes, which would be negated once they are separated.  …

Hilchot Kashrut: When Does a Mixture Become Treif?

by Rabbi Dov LinzerPosted on March 11, 2011

The Mishna (Hullin 108) states that if a drop of milk falls on a piece of meat in a stew, and there is enough milk that it can be tasted in the meat, then the meat becomes basar bi’chalav (hereafter, bbh), milk and meat cooked together, and is forbidden. …

Hilkhot Kashrut: Taste Transfer and Pickling

by Rabbi Dov LinzerPosted on February 11, 2011

The Gemara recognizes a number of ways in which taste can transfer from one food to another without the presence of heat.   First, there can be surface transfer when one or both of the foods are moist, such as when cheese touches a piece of meat. …