Russ's Bacon and Mushroom-Stuffed Roast Beef

Ingredients

• 1/2 teaspoon salt
• 1/2 teaspoon black pepper
• 1 pound flank steak
• 1 tablespoon Dijon mustard
• For Bacon and Mushroom Stuffing:
• 2 tablespoons vegetable oil
• 1 small onion, chopped
• 1 (4 ounce) can mushroom pieces, drained and chopped
• 1/4 cup chopped parsley
• 1 tablespoon tomato paste
• 1/4 cup dried breadcrumbs
• 1/4 teaspoon salt
• 1/4 teaspoon black pepper
• 1 teaspoon paprika
• For Sauce:
• 3 strips bacon, chopped
• 2 small onions, finely chopped
• 1 cup hot beef broth
• 1 teaspoon Dijon mustard
• 2 tablespoons ketchup