Beef Short Ribs:

• 2 pounds bone-in beef short ribs
• Salt and black pepper to taste
• 2 tablespoons olive oil

Caramelized Onions:

• 2 tablespoons unsalted butter
• 4 large yellow onions (thinly sliced)
• 1 tablespoon brown sugar
• 1 tablespoon balsamic vinegar
• 3 cloves garlic (minced)
• 1 tablespoon fresh thyme (or 1 teaspoon dried)
• 1 bay leaf

Soup Base:

• 6 cups beef broth (low sodium)
• 1/2 cup dry red wine (optional)

Finishing Touches:

• 1 baguette (sliced)
• 1 1/2 cups shredded Gruyère cheese