Salisbury steak with onion gravy

• 1/4 cup olive oil
• 1 large onion, grated (about 1 1/3 cups)
• 3 slices white bread
• 1/2 cup whole milk
• 2 pounds ground sirloin
• 2 t. minced garlic
• 1 large egg
• 2 tablespoons chopped flat-leaf parsley
• 2 teaspoons plus a dash of Worcestershire sauce
• Coarse salt and freshly ground black pepper
• 1 tablespoon cornstarch, divided plus 1/4 cup for dusting
• 1 can of beef broth

Directions

1. Heat a medium saute pan over medium heat. Add 2 tablespoons oil and 1 cup onion. Reduce heat to low, and cook, stirring occasionally, until onions are golden brown and caramelized, about 35 minutes. Set aside.
   
2. Soak bread in milk. Finely chop. In a large bowl, combine the remaining 1/3 cup onions, the sirloin, garlic cloves, bread, egg, parsley, 2 teaspoons Worcestershire sauce,  salt and pepper. Mix with your hands to combine. Divide meat mixture into 8 oblong patties . Dust with cornstarch.
   
3. Heat a large skillet over medium-high heat. Add remaining oil, and reduce heat to medium. Cook patties, for 6 minutes, without moving them. Flip, and cook until cooked through, about 9 minutes. Set aside on a plate. Repeat with remaining patties.
   
4. Make the gravy: Add cooked onions and start with 1 t.cornstarch to same skillet, and stir for 1 minute. Raise heat to medium-high. Pour in broth and a dash of Worcestershire sauce, and whisk until broth is clear and slightly thickened, about 3 minutes.  You may need to add more cornstarch to get it thickened. Remove pan from heat, and return patties and juices to skillet, spooning sauce on top.