Italian Sausage Pasta Revised

So I also made this again and made some revisions and it turned out even better!

1 package bow tie pasta (or whatever type you have on hand)
4 links of italian sausage, 2 with the casings removed
1 onion cut into quarters and then sliced
5 cloves garlic minced (yeah we like garlic)
1 can (14.5 oz) diced tomatoes, drained slightly
2 tablespoons italian seasoning
1 1/2 cups of milk, separated
2 tablespoons cornstarch

1. Bring a large pot of lightly salted water to a boil. Cook pasta until al dente. Drain.
2. Heat a large deep skillet. Cook the two whole sausages until done. Take them out and slice and put in the 2 other sausages with the casings removed. Break them up into small pieces. Cook until brown. Add back in the sliced sausage and onions and garlic. Cook until the sausage is all golden brown and crunchy, and the onions and garlic are soft.
3. Add in the diced tomatoes, 1 1/4 cups of milk, and 2 tablespoons of italian seasoning. Let come up to a boil. Meanwhile, take the remaining 1/4 cup of milk and mix in 2 tablespoons of cornstarch. Stir into the pot and turn down the heat to a simmer. Let cook for about 8-10 minutes to let all the seasonings come together. 4. Stir in pasta. Let simmer all together for a few minutes. Serve and enjoy.