Caramelized onion butternut squash roast with chestnuts

Ingredients

1) Roast:

• 1 pound onions
• 1/3 cup olive oil
• 1 pound fresh chestnuts
• 2 pounds butternut squash, peeled and cut into 1/2 inch cubes
• 1 15oz can white beans, drained and rinsed
• 2 tea spoons dried thyme
• 1 1/2 tea spoons ground coriander
• 1/2 tea spoon freshly grated nutmeg
• 1 1/2 tea spoons salt
• Pepper
• 1/2 cup vegetable broth

2) Crumb topping:

• 1/2 cup bread crumbs
• 2 table spoons olive oil
• 1/2 tea spoon dried rubbed sage
• Pinch of ground cayenne
• 1/2 tea spoon salt
• Pepper