Filet of Beef Bourguignon

Name: Filet of Beef Bourguignon
Ingredients: 1 (3-pound) filet of beef, trimmed; Kosher salt and freshly ground black pepper, for seasoning plus 1 teaspoon salt and 1/2 teaspoon pepper; 3 to 4 tablespoons good olive oil; 1/4 pound bacon, diced; 2 garlic cloves, minced; 1 1/2 cups good dry red wine, such as Burgundy or Chianti; 2 cups beef stock; 1 tablespoon tomato paste; 1 sprig fresh thyme; 1/2 pound pearl onions, peeled; 8 to 10 carrots, cut diagonally into 1-inch-thick slices; 3 tablespoons unsalted butter at room temperature; 2 tablespoons all-purpose flour; 1/2 pound mushrooms, sliced 1/4-inch thick (domestic or wild)