Homemade Salisbury Steak

Ingredients (19)

• 1 pound ground beef
• 1 large egg
• 1/4 cup breadcrumbs
• 1/4 cup Parmesan cheese, grated
• 1 tablespoon Worcestershire sauce
• 1 teaspoon Kosher salt
• 1/2 teaspoon black pepper
• 1/2 teaspoon red pepper flakes
• 1/4 teaspoon garlic powder
• 1/4 teaspoon dried thyme
• 1 tablespoon butter
• Parsley, garnish
• Mashed potatoes, for serving
• Onion Brown Gravy:
• 1 large white onion, sliced thin
• 2 tablespoons unsalted butter
• 2 tablespoons all-purpose flour
• 2-3 cups beef stock
• Salt and pepper