Boil the bratwurst for 5 minutes.

In a medium saucepan, combine tomato sauce, diced fire-roasted tomatoes, diced green bell pepper, A1 sauce (or Worcestershire), oregano, basil, garlic powder, sage, and cinnamon.

Cook the mixture over medium heat.

Slice the cooked bratwurst into approximately a dozen diagonally sliced segments.

Add the sliced bratwurst to the saucepan.

Bring the sauce to a boil for 2 minutes.

Reduce the heat to low, cover, and simmer for 15 minutes.

Remove the lid and simmer uncovered for approximately 10 minutes, or until the sauce has reduced to your desired consistency.