Entrecôte à la Mirabeau

• 1 thick steak
• 2 tablespoons butter
• 1 tablespoon flour

Mash butter and flour to a smooth paste; add anchovy paste and blend well. Spread anchovy mixture over steak; season to taste with freshly-ground black pepper and grill on one side in usual manner. Remove steak; turn it over and make a lattice-work of anchovy fillets on the uncooked side. Fill each square with a slice of olive; brush with melted butter or olive oil and grill until done. Serve w