Cook the Pasta:Bring a large pot of salted water to a boil. Cook rotini according to package directions. Drain and set aside.
Season and Prep the Steak:Brush both sides of the steaks with oil and sprinkle evenly with steak spice or seasoning.
Sear the Steak:Heat a non-stick skillet over medium-high heat. Sear the steaks for a few minutes per side until they reach your desired doneness (130–135°F for medium-rare). Remove from the pan and let rest under foil.
Make the Alfredo Sauce:Wipe out the skillet and lower the heat to medium. Melt butter, then stir in the garlic puree and cook for 1–2 minutes until fragrant.
Add the Cream and Seasoning:Pour in the heavy cream. Add salt and pepper. Stir well and bring to a gentle boil, letting the sauce thicken for 3–4 minutes.
Toss the Pasta:Reduce heat to low. Add the cooked pasta into the sauce and stir to coat evenly. Mix in the parmesan cheese until melted and the sauce is creamy.
Plate and Serve:Slice the rested steak and serve it over the creamy Alfredo pasta. Garnish with additional parmesan or fresh parsley if desired.