Mince your garlic and slice your bell peppers & red onions into thin strips. Set both aside, but don't mix together quiet yet.
Heat your Cast Iron Skillet to medium-high heat and add just enough oil to coat the bottom of the pan. If you don't have a cast iron you can use any oven-safe pan. If you don't have an oven-safe pan: when it's time to put everything in the oven, transfer it to a foil-lined sheet tray.
Add the Italian sausage and brown for 2-3 minutes.
Flip the Italian sausage add the sliced bell peppers and onions. Cook for 2-3 more minutes.
Remove the Italian Sausage once both sides have a nice brown color. Set aside.
Stir the peppers and onions around the pan and then add the garlic and cook for just a few minutes or until you can really smell it cooking, but be careful to not let it burn.
Add the diced tomatoes, oregano, thyme, and basil and cook for 1-2 more minutes.
Season with kosher salt and fresh ground pepper.
Add the Italian sausage back into the pan and bake 10-15 minutes, or until the sausage is cooked all the way through (160) and the peppers and onions are tender.
Enjoy!
Video
Notes
The Costco pack of Italian sausage has 5 links in it, which is why I used 5. You won't need to make more peppers and onions unless you are making more than 8 or so.
My husband always eats 2, while the kids and I generally eat 1. Make enough for the people you are feeding.
You could also add crushed red pepper to make this spicy if you like heat.
Eat on a roll, with potatoes, perogies or by itself. No wrong answer.
I am a fan of instant-read thermometers to double-check that my meat is cooked all the way through. Sausage needs to cook until 160 and it's nearly impossible to tell by touch.