Preheat the Dutch oven. Brown the ground beef. When done remove the beef to a large mixing bowl. Add the spaghetti sauce to the beef and mix well. In another bowl, add the cottage or ricotta cheese, Parmesan cheese, mozzarella cheese (reserve a few ounces for later), eggs, and oregano, and mix well. Place the layers in the oven in the following order: Break up four lasagna noodles into the bottom of the oven. Spread about 1/3 of the meat mixture over the noodles. Spread 1/2 of the cheese mixture over the meat mixture. Break up five noodles and place over the top of the preceding mixtures. Spread 1/2 of the remaining meat mixture over the noodles. Spread the remaining cheese mixture over the meat mixture. Break up the remaining noodles and place over the cheese mixture. Spread the remaining meat mixture over the noodles. Pour the hot water all around the edges of the oven. Place the lid on the oven and bake one hour or until done. Check frequently. Hints: This recipe works well with charcoal (12 briquettes on bottom and 12 on top). Cooking time can be reduced by pre-cooking and draining the lasagna noodles.