If serving with chicken, cook the chicken your preferred method. I season it with salt and pepper and cook it in a skillet about 12 minutes each side or until it's 165º internally. Please cook the chicken any way you prefer.
Heat olive oil in a large skillet on medium heat. When shimmering and heated, add the onions and a generous pinch of salt. Cook on medium/low stirring frequently until evenly browned and caramelized. About 30-40 minutes. This process can take longer depending on the thickness of the onions.
Add the minced garlic and fresh thyme. Sauté for 2 minutes. Add the sherry wine to deglaze the pan. Next, add the flour and mix it in well. Cook for another 2-3 minutes, until thickened.
Pour in the beef broth, Worcestershire sauce and water. Season with salt and freshly ground black pepper. Add the pasta, bring it to a simmer and cook for 10-12 minutes or until the pasta is al dente. Different shapes and brands of pasta will vary in cooking time. You may need to add an extra 1/4 - 1/2 cup of water if the pasta soaks all the liquid up too quickly.
Once the pasta is cooked to your liking, give it a taste. Add more salt or Worcestershire if desired. Pour in the cream and add the chopped chicken Give it a mix and garnish with dried parsley and or toasted bread crumbs. Serve and enjoy!