Heat oil in a Dutch oven or a large, heavy-bottomed pot over medium-high heat. When it shimmers, add onion and garlic, season well with salt and freshly ground black pepper and cook until just softened. Add sausage and ground pork and stir to break up meat. Cook, stirring occasionally, about 8 to 10 minutes. Add water and cook, scraping bottom of pan to incorporate browned bits. Add tomatoes, 1 teaspoon salt, basil, oregano, bay leaf, and season well with freshly ground black pepper. Stir until well mixed and tomatoes start to simmer. Reduce heat to low and simmer, stirring occasionally, until flavors meld, at least 10 minutes and up to 1 hour.

Heat oven to 375 degrees F and arrange rack in middle.

Spread 2 cups sauce in a thin layer over the bottom of a 13 by 9-inch baking dish. Layer 4 noodles over sauce, top with 2 cups sauce and spread it evenly over the noodles. Evenly dollop 1/4 of the ricotta across the sauce, top with 1/4 of the mozzarella, and sprinkle evenly with 1/4 cup Parmigiano-Reggiano. Repeat with remaining ingredients. Cover with foil and let sit on counter before baking for about 1/2 hour. Bake until liquids are bubbling and noodles are beginning to soften, about 40 minutes.

Remove foil and continue baking until top is golden brown and noodles are completely tender, about 20 minutes more. Allow to rest 20 minutes before cutting.