I've been making beef stroganoff for my family for years, but once we started keeping kosher, I had to completely rethink this classic comfort food. The traditional version relies heavily on sour cream for that signature tangy richness, which obviously doesn't work when you're serving it with beef. After many experiments in my kitchen, I finally cracked the code on a dairy free version that delivers all the comfort of the original. The secret isn't trying to replicate sour cream with some weird substitute. Instead, I build layers of flavor using beef stock, white wine, and a touch of apple cider vinegar for that subtle tang. The mushrooms do most of the heavy lifting here, releasing their earthy juices as they cook down with the onions. I use a mix of cremini and shiitake when I can find them, but regular button mushrooms work perfectly fine too. What makes this stroganoff work is the technique. You can't rush the browning of the beef or the cooking of the mushrooms. Each step builds flavor that carries through to the final dish. I like to use beef chuck or sirloin cut into strips, nothing too fancy. The key is getting a good sear on the meat before it goes back into the sauce to finish cooking. This feeds a crowd and reheats beautifully, which makes it perfect for Shabbos prep or weeknight dinners when everyone's coming and going at different times. I serve it over wide egg noodles or mashed potatoes, with some steamed green beans or roasted Brussels sprouts on the side.