Step 1: Cook the Pasta
Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente. Reserve 1/2 cup of pasta water, then drain and set the pasta aside.

Step 2: Sear the Sausage Bites
Heat a large skillet over medium heat. Melt the butter, then add the sausage slices in a single layer. Cook for 3–4 minutes per side until browned and crispy. Add the minced garlic, Italian seasoning, and red pepper flakes. Stir to combine and cook for another 1–2 minutes until fragrant. Remove the sausage bites from the skillet and set aside.

Step 3: Make the Parmesan Sauce
In the same skillet, add olive oil and heavy cream. Simmer over low heat for 3–4 minutes, stirring occasionally. Gradually whisk in the Parmesan cheese until the sauce is smooth and creamy. Season with garlic powder, salt, and pepper to taste.

Step 4: Combine Pasta and Sauce
Add the cooked pasta to the skillet with the Parmesan sauce. Toss to coat evenly. If the sauce is too thick, add reserved pasta water, one tablespoon at a time, until the desired consistency is reached.

Step 5: Add Sausage Bites
Return the garlic butter sausage bites to the skillet. Toss gently to distribute them throughout the pasta. Allow everything to heat through for 2–3 minutes.

Step 6: Garnish and Serve
Transfer the pasta and sausage to a serving platter. Sprinkle with fresh parsley if desired. Serve immediately with extra Parmesan on the side.