Classic One Pot American Goulash

Name: Classic One-Pot American Goulash
Ingredients: 1 medium yellow onion; 1 tablespoon olive oil; 1 pound lean ground beef (90% lean); 1 1/2 teaspoons Italian seasoning; 1 teaspoon kosher salt; 1/2 teaspoon garlic powder; 1/4 teaspoon red pepper flakes; 1 (28-ounce) can crushed tomatoes; 2 cups beef broth; 1 tablespoon Worcestershire sauce; 2 cups dried elbow macaroni (about 9 ounces); 4 ounces cheddar cheese; 1/4 bunch fresh parsley