Traditional Bolognese sauce is a tomato-based sauce but it's heavy on the meat and slightly lighter on the tomato :) Bolognese sauce is often just called "meat sauce" and is slow cooked with onions, carrots, celery, and garlic..which may sound odd, but these veggies add such a depth of flavor. Traditional Bolognese sauce is also cooked with milk. I have chosen not to cook milk into this bison meat sauce recipe. However, I do find stirring in 1/2 cup of milk or even half and half at the VERY END cuts the acidity of the tomatoes and balances out the flavors nicely. But it's totally optional.