Salisbury Steak Garlic Mash Potatoes Mushroom & Onion gravy

INGREDIENTS

• • For the steaks :
  • 1/3 cup of breadcrumbs
  • 1 egg
  • 1 small yellow onion, grated
  • 1 teaspoon of kosher salt
  • 1/2 teaspoon black pepper
  • 1 pound of lean ground beef like 90/10
  • 1 tablespoon of extra virgin olive oil
  • For the mushroom sauce :
  • 2 tablespoons of butter
  • 8 oz. sliced mushrooms I used baby portobellas (cremini)
  • 2 tablespoons all-purpose flour
  • 2 cups of beef broth
  • kosher salt to taste
  • black pepper to taste