Stumbled over to http://www.performancenutritionals....t2/merchant.mvc after I googled "kosher low carb".

They have some bars, Luna Glow Low Carb Bars For Women, certified kosher. I can't attest to their taste, I'm not into bars. (I don't know why, it's a mental thing. Must have been beaten with a granola bar as a child or something ;- ) "With just two to three net carbs per bar and no trans fat, LUNA Glow is the perfect choice for women looking for an indulgent, low-carb snack treat. Each elegant, triple-layer LUNA Glow bar contains eight grams of protein and, like its sister LUNA, 23 vitamins and minerals essential to women's nutrition, including folic acid, calcium and iron. LUNA Glow also has just 140 calories and is the first low-carb bar to be certified kosher." Hope they taste good.