Butternut Bisque with French Onion Toast Topper Recipe

Ingredients

• 3 tablespoons butter
• 1 1/2 cups chopped onion
• 1 1/2 teaspoons kosher salt
• 2 tablespoons tomato paste
• 1 (2 pound) butternut squash - peeled, seeded, and cut into 1-inch cubes
• 4 cups low-sodium chicken broth
• 1 pinch cayenne pepper
• 1/2 cup heavy cream
• 2 tablespoons pure maple syrup
• 1 tablespoon chopped fresh parsley, or to taste
• 1 tablespoon olive oil
• 3 large sweet onions, chopped
• 1 large shallot, thinly sliced
• 1/2 teaspoon salt
• 1/4 teaspoon ground black pepper
• 2 tablespoons sherry
• 1/2 cup low-sodium beef broth
• 2 fresh thyme sprigs
• 6 slices sourdough bread
• 6 teaspoons butter, softened
• 6 ounces shredded Gruyere cheese