one pan, 8- by 10-inches for deep dish or 9- by 13-inches for a thinner version
Preheat oven to 350°F. Bring a large pot of water to boil for the pasta. When it comes to boil, add a couple tablespoons of salt. Cook the pasta al dente, following package instructions. Remove pasta from the water and set aside.
Reheat bison Bolognese.
Pick your pan: around 8- by 10-inches or up to 9- by 13-inches. Grease with butter.
Assemble the lasagne: Start with a few tablespoons of Bolognese, then layer pasta, ricotta, Bolognese, mozzarella, and parmesan. Repeat for a total of three layers, ending with cheese on top. Cover tightly with foil and bake for 1 hour, removing foil for the last 10 minutes. Remove from the oven and let sit 10–30 minutes before serving.