Salisbury Ground Beef

Name: Salisbury Ground Beef
Ingredients: 1 tablespoon canola oil; 1 pound 90/10 lean ground beef; 1 medium yellow onion , finely chopped (about 1 cup ); 3 large cloves garlic , finely chopped; 4 tablespoons unsalted butter; 1 ( 8 - ounce ) package sliced cremini mushrooms; 1/4 cup all-purpose flour; 3 cups beef broth; 2 tablespoons Worcestershire sauce; 2 teaspoons Dijon mustard; 1 teaspoon chopped fresh thyme , plus leaves for garnish; 1/2 teaspoon freshly ground black pepper; 1 to 2 teaspoons kosher salt; 12 ounces pasta (like pappardelle), cooked according to package directions