Ingredients

The following ingredients have 4 Servings
  • 2 oz. 1/4 cup unsalted butter, more for the baking sheet
  • 5-6 medium-large yellow onions (about 2 lb., thinly sliced (8 cups))
  • Kosher salt and freshly ground black pepper
  • 1 tsp. granulated sugar
  • 1 small baguette (1/2 lb., cut into 1/2-inch slices)
  • 2 quarts Roasted Beef Broth (recipe above or canned beef broth :()
  • 1 bay leaf
  • 2-3 cups grated Gruyere
  • best if you make this the day (or two before serving)
  • 5 lb. meaty beef or veal bones (such as shanks, knuckles, and ribs)
  • 2 medium carrots (cut into big chunks)
  • 2 medium yellow onions (quartered)
  • 1 bouquet garni (1 sprig fresh thyme, 1 bay leaf, and 4 parsley stems, tied with twine)
  • 1 Tbs. black peppercorns
  • 1 Tbs. tomato paste

Instruction