The main advantage of ground beef is clearly budget, and if worked properly you can also have wonderful flavor. First, get ground chuck. Chuck is the shoulder cut of beef, the shoulder muscles being well worked from the grazing action of the steer. More muscle action equals more flavor, and a tougher cut of meat. Chuck is notoriously tough as a steak (ask my father who used to try to cook chuck steaks in his poor bachelor days), but one of the most flavorful parts of the animal. Grinding the meat tenderizes it, but the flavor is still there. Second, take the time to properly brown the meat. In other words, don’t stir it! Just let it cook, on relatively high heat, until well browned, before giving it a stir. The browning is what gives you the flavor. Use the cooking of the onions and mushrooms to scrape up any of the browned bits, and deglaze the pan to get the rest. It’s also important to salt while you cook. If you get to the end of this recipe and it’s dull, it’s because you haven’t salted it enough. Experiment with the spices if you want. A little ground nutmeg can give it a lift, as well as tarragon. Working in batches as not to crowd the meat (crowding it will make it hard to brown), break up the ground beef and add it to the pan. Sprinkle the meat with salt. Do not stir the meat, as stirring will prevent browning. Once the meat is well browned on one side (a couple minutes, depending on how hot the pan), use tongs or a fork or a metal spatula to flip to the other side. Once that side is browned as well, use a slotted spoon to remove from the pan and set aside. Continue to brown the meat in batches, adding a teaspoon of butter to the pan with each batch if needed, and salting the pan and the meat, until it is all browned. Remove meat from pan. Drain excess fat from pan. Cook the onions, scraping up the meat drippings, until soft, about 5 minutes. Remove onions from the pan (add to the meat). Add the sherry (or dry white wine or water) to the pan to deglaze the pan, scraping up any browned bits. Let the sherry reduce by at least a half, then lower the heat to low. Stir in the lemon juice, and about 1/4-1/2 teaspoon of salt (taste). Stir in the meat and onions. Stir in the chopped parsley. Add more salt, pepper, and/or paprika to taste. Serve the hamburger stroganoff on top of egg noodles.