Add the breakfast sausage, bacon, and chopped onion to a saute pan or large pot and set over medium high heat on the stovetop. Cook until sausage is browned and bacon is crisp. Stirring as needed.
Add the Rotel tomatoes along with any liquid in the can. Scrape the bottom of the pot with a wooden spoon to loosen any burnt on bits and allow them to incorporate into the chili. Then add the chili beans and tomato sauce.
Bring the chili to a simmer and let cook for 15 minutes.
You can serve the chili immediately, but the flavor is best if it melds in the refrigerator overnight.
Notes
*You can substitute diced tomatoes for Rotel if you don't wish to include peppers.