Bring a large pot of salted water to a boil, add in some olive oil and drop in pasta. Let it cook while you handle the next step - but drain it as SOON as it is soft enough. To soft and it is ruined.

Chop onion and garlic and begin sweating half of the onions in the heated oil - add in half the garlic once the onion reaches pliability. Chunk up the sausage and ground beef and add to the pan cooking it thoroughly. Drain and set aside

In a large sauce pan add in the sauce, remaining onions and garlic, the spices and sugar and the diced tomato and tomato paste. Set this up to simmer over the next few hours stirring frequently. Halfway through the simmer add in the drained meat. The length of simmer guarantees all the flavors meld together and soak into the meats. You can shorten this for brevity, but you will loose flavor.

Once you feel the sauce is to your liking (I taste often and add in salt or basil or thyme as it is cooking) take it off the burner. Add a few spoonful of the sauce to the bottom of your baking dish (I use a casserole dish because of the depth).
Start with a layer of noodles, then a light layer of the hot sauce and spoon in (lightly) dollops of ricotta spreading it around. A light layer of mozzarella cheese on top of that and then add noodles again evenly layered.

Then heavier on the sauce this time some more ricotta (do not over do this - it is rich and spreads around when heated) and more mozz.
Top layer is light noodle and heavy mozz.

Put the baking dish on a sheet pan for easier pick up later. Take tin for and Tent the dish, do not cover it tightly and slide into a preheated 350 degree oven. Cook for about 30 - 40 minutes. Take tented foil off 5 minutes before time is up and see if the cheese is bubbling... then you know it is done.
I like to hit broil for a few minutes after to get that top layer nice and crunchy.

Let the dish site for 10 minutes to settle and then service with some good bread and olive oil dipping mixture and enjoy!

Leftovers are best heated in a fry pan with a splash of milk. Cover and let the milk work its magic. Stir it up a few time and then get that bread to sop up all the yum juice. The pasta tastes even better after this.