Beef with mayo

4 lbs beef tenderloin or 4 lbs steaks 1 tablespoon olive oil 1 teaspoon dried rosemary , crushed 1/2 teaspoon coarse sea salt or 1/2 teaspoon kosher salt[...]

1 lb ground turkey 1 small onion , chopped 1 garlic clove , minced 2 teaspoons Worcestershire sauce (it lends the turkey a more "beefy" flavor) 4 slices[...]

1 1/2 pounds ground round 1 tbsp seasoned salt 1 tbsp pepper 1 tbsp Worcestershire sauce 4 Babybel white cheddar cheese discs (you could use whatever cheese[...]