Potato Casserole with Caramelized Onions

Ingredients

• 1 tablespoon sugar
• ¾ cup butter, divided
• ½ teaspoon salt
• 1 cup whipping cream
• 4 cups chicken broth
• 4 large eggs, lightly beaten
• 1 cup sour cream
• + 3 more ingredients
• • 4 pounds baking potatoes, peeled and cubed
  • 6 large sweet onions, diced
  • ¼ cup olive oil

Melt 1/4 cup butter in a large skillet over medium heat. Add olive oil, onions, and sugar. Cook, stirring often, 25 to 30 minutes or until onions are deep golden brown. Remove from heat, and set aside.Bring potatoes and chicken broth to a boil in a Dutch oven; cook 20 minutes or until tender. Dra...

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