Prep the vegetables and field roast sausage. Slice the onion and peppers, chop garlic, and slice sausage (if using). Set aside.
Place a large pot of water with salt over medium-high heat and bring to a boil. When water comes to a boil, add the pasta and cook per directions. (This can vary depending on the type of pasta you have). Reserve one cup of pasta water after draining.
While the pasta is cooking, place a large skillet on medium heat and drizzle in oil.
When the pan is hot, add in the sausage and let brown on eack side. Remove from skillet and set aside.
Add onions and peppers to skillet. Cook until onions are translucent. Then add in garlic, cajun seasoning, milk, brown sugar, and crushed tomatoes. Add some of the pasta water if the sauce is too loose. Bring to a simmer
Toss in sausage and cook for 5-7 more minutes
Toss pasta into the skillet to combine. Add salt and pepper to taste. Enjoy!