Au Jus: Easy Restaurant-Style Sauce at Home - Kitchen20

Ingredients

• 2 tablespoons unsalted butter (30 ml)
• 1 medium yellow onion, chopped (US: about 1 cup; metric: 150g)
• 2 carrots, chopped (US: about 1 cup; metric: 120g)
• 2 celery stalks, chopped (US: about 1 cup; metric: 120g)
• 2 cloves garlic, minced (about 2 teaspoons)
• 2 cups beef broth, low sodium (475 ml)
• 1 cup pan drippings from roast beef (235 ml)
• 1 tablespoon Worcestershire sauce (15 ml)
• 1 teaspoon tomato paste (5 ml)
• 1 sprig fresh thyme
• 1 bay leaf
• 1/2 teaspoon black peppercorns
• 1 tablespoon cornstarch (or all-purpose flour) (15 ml)
• 2 tablespoons cold water (30 ml)
• Salt and freshly ground black pepper, to taste