Beef Tenderloin with Marsala without crumbs brownies

1 (4 lb) whole beef tenderloin , trimmed 1 tablespoon olive oil 1/2 teaspoon ground black pepper 1 Heat the oven to 500 degrees F. Rub the beef tenderloin[...]

1/2 cup melted unsalted butter , plus 1 tablespoon unsalted butter , plus 2 tablespoons unsalted butter 1/4 cup cognac , plus 2 tablespoons cognac 1[...]

2 cups dry red wine 1 cup tawny port 2 cups beef broth 3 tablespoons butter 2 onions , chopped 1 tablespoon fresh thyme , chopped (or use 1 teaspoon dryed) 3[...]

2 tablespoons olive oil , divided 5 cloves garlic , peeled and minced 1 onion , finely chopped 10 ounces fresh mushrooms , sliced 1 lb baby spinach, washed[...]