Step 1: Cook the Pasta
Fill a large pot with water and add some salt. Bring it to a boil and add your pasta. Cook it until it’s tender but still has a little bite to it. Before you drain the pasta, save about 1 cup of the pasta water in a bowl – you might need this later. Drain the pasta and set it aside.

Step 2: Cook the Beef and Vegetables
Put a large skillet on medium heat and add the ground beef. Break it up with a spoon as it cooks. Cook until there’s no pink left, about 6-8 minutes. Add the chopped onion and cook for 3-4 minutes until it gets soft. Add the minced garlic and cook for 1 more minute. If there’s too much grease, you can drain some out.

Step 3: Make the Creamy Base
Add the butter to the beef and let it melt. Slowly pour in the heavy cream and milk while stirring. Heat this up but don’t let it boil hard – just gentle bubbles. Add the ketchup, mustard, and Worcestershire sauce. Stir everything together and cook for about 2 minutes.

Step 4: Add the Cheese
Turn the heat down to low. Slowly add the cheddar cheese while stirring constantly so it melts smooth. Then add the Parmesan cheese the same way. If the sauce seems too thick, add a little bit of that pasta water you saved. Add salt and pepper to taste.

Step 5: Combine and Serve
Add the cooked pasta to the pan and stir everything until the pasta is covered with the creamy sauce. Serve it hot and let everyone add their favorite toppings.