Add the olive oil to a large pot and heat over medium-high heat.
Add the ground beef and sausage, sauté until cooked, strain the fat and set aside.
In the same pot, add the onion, celery, pepper, zucchini, and carrots. Sauté for roughly five minutes or until onions are translucent.
Add the rest of the ingredients and let simmer on medium-low for 15 minutes.
In a small bowl add all the ingredients for the ricotta layer and mix.
Add 1/4 cup of the sauce to the bottom of your Crockpot or slow cooker and layer the noodles, ricotta mixture, cheese, meat sauce and continue until you run out of ingredients. Top with remaining cheese. Cook on low for 3-4 hours or high on 5-6 hours.