Bring a pot of water to a boil and cook the pasta per package instructions.
While the water is coming to a boil, place a large skillet on the stove and turn on the heat to medium. Add the butter
Dice up zucchini, squash, peppers, and onions to a similar size. About half an inch big.
Mince garlic
Add the diced peppers and onions into the buttered skillet. Cook on medium heat for about 10 minutes, just before the onions turn translucent
Add the rest of diced up vegetables and minced garlic into the buttered skillet. Cook on medium heat until the vegetables are starting to soften – about 10 minutes.
Season with salt and pepper to liking. Stir frequently to ensure the vegetables do not get burned.
Dice the sausage into quarter-inch-thick slices
Add the (pre-cooked) sausage to the skillet with the vegetables. Cook time for sausage will vary depending on what type of sausage you use. Pre-cooked sausage will have a lower cook time than raw sausage. Raw sausage should be cooked separately from vegetables to ensure it is fully cooked.
Once pasta is fully cooked, strain, and add to the skillet
Half the cherry tomatoes and add to the skillet
Turn the skillet heat to simmer for 5-10 minutes until the cherry tomatoes soften
Once everything is cooked, remove from heat, add to a bowl and top with parmesean cheese