Anytime Brisket with Matzo Spaetzle

Name: Anytime Brisket with Matzo Spaetzle
Ingredients: * 1 3-4 pound point-cut brisket (also known as second cut), fat cap trimmed to 1/8 inch; * Kosher salt and freshly ground black pepper; * 3 tablespoons neutral oil; * 3 yellow onions thinly sliced (3 cups); * 3 garlic cloves thinly sliced; * 2 bay leaves; * 5 sprigs fresh thyme tied with twine; * 1/2 cup (4 ounces) tomato paste; * 2 cups dry red wine such as Pinot Noir or Cabernet Sauvignon; * 1 quart chicken stock store-bought or homemade; * 3/4 pound whole carrots 1-1/2-inch diameter; * 2 tablespoons extra virgin olive oil; * Matzo Spaetzle (see recipe link in headnote); * 2 tablespoons thinly sliced fresh chives