Bring a large pot of salted water to a rolling boil over high heat. Add your pasta and cook according to package instructions until al dente, usually about 8-10 minutes. Reserve a cup of pasta water, then drain the pasta in a colander and set aside.

In a large skillet, heat a tablespoon of olive oil over medium heat. Add the Italian sausage, breaking it apart with a spatula as it cooks. Sauté for 5-7 minutes, until the sausage is browned and cooked through.

Once the sausage is cooked, stir in 3 minced garlic cloves and halved cherry tomatoes to the skillet. Cook for 2-3 minutes until fragrant and tomatoes soften.

Lower the heat and add about 1 cup of pesto sauce to the skillet, stirring to combine with the sausage and tomatoes. Gradually toss in the cooked pasta.

Remove the skillet from the heat, and transfer your pasta to serving plates. Generously sprinkle with freshly grated Parmesan cheese and serve immediately.