The Kosher Terroir

Michael Kay, Invei a Winery Built on Resilience

• Solomon Simon Jacob • Season 5 • Episode 3

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A single mix-up call sends Michael Kay to a champagne facility as a last-minute kosher supervisor, and by the grace of Ha'Shem, that becomes the start of a new life in wine. I sit down with Michael, founder of Invei, to unpack how a former book editor builds a serious California kosher winery out of a garage, sources fruit from vineyards he doesn’t own, and still manages to make bottles that surprise even experienced drinkers.

We get specific about the craft: how Michael evaluates growers, why tasting wines made from a vineyard can be the best first filter, and what he looks for when he walks rows that aren’t “his.” Then we go hour by hour through harvest day logistics, from bins and forklifts to quality checks that can force a hard decision before the must ever hits the tank. If you’ve ever wanted a clear explanation of fermentation control, we dig into cold temps, glycol chillers, lab testing delays, yeast selection, nutrient timing, and how stability problems can show up later in the bottle.

Michael also shares how being a mashgiach shapes winemaking choices around additives, plus what he learned at massive operations like Gallo that still matters when you’re running small-batch kosher wine. We talk underrated standouts like Gewürztraminer and Petit Verdot, dream varietals he wants to make next, and the partnership dynamics with Rabbi Dovber Berkowitz that keep Invei both ambitious and grounded.

If you enjoy smart wine talk with real-world cellar details, subscribe, share this with a wine-loving friend, and leave a review so more listeners can find Kosher Terroir.

For More Information:
Invei Winery:  Berkeley California
Michael Kay Winemaker Co-Founder / Rabbi Dovber Berkowitz Co-Founder
www.invei.com
Phone: +1 510-847-5268

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