In a large pot of salted boiling water, cook the rotini pasta according to package instructions. Drain and set aside.

In a large skillet over medium heat, cook the ground beef until browned and fully cooked. Drain any excess fat and set the beef aside.

In the same skillet, heat olive oil or butter. Sauté the minced garlic for about 1 minute, until fragrant.

Sprinkle the flour into the skillet and whisk for 1-2 minutes until golden and bubbly.

Gradually add the milk while whisking to create a smooth sauce.

Stir in Parmesan cheese, Italian seasoning, salt, and pepper. Cook for 3-5 minutes, until the sauce thickens.

Return the cooked beef and drained pasta to the skillet. Toss to coat everything evenly in the creamy garlic-Parmesan sauce.