Creamy Scalloped Sweet Potatoes with Half and Half — The Mom 100

Ingredients

• 2 tablespoons (1/4 stick) unsalted butter
• ½ cup minced red onions
• ½ cup minced shallots
• 1 teaspoon minced fresh oregano ((or thyme leaves))
• 1 teaspoon kosher salt
• ½ teaspoon freshly ground black pepper
• ¼ teaspoon red pepper flakes ((optional))
• 1 cup half and half
• 1 cup heavy cream
• 4 large sweet potatoes ((about 2 1/2 pounds; peeled and very thinly sliced))
• 1 cup shredded cheese ((such as Gruyere or sharp cheddar; optional))