How to Make a Frittata — The Mom 100

Ingredients

• 2 tablespoons unsalted butter ((1/4 stick))
• 1 large waxy potato ((such as white, red, or Yukon Gold, peeled, quartered, and thinly sliced))
• 1 onion ((quartered and very thinly sliced))
• ½ teaspoon dried thyme, oregano, or basil ((or 1 teaspoon chopped fresh thyme, oregano, or basil))
• Kosher salt and freshly ground black pepper ((to taste))
• 10 large eggs
• ¼ cup heavy cream
• 1 cup chopped fresh spinach
• ¼ cup coarsely chopped fresh Italian flat-leaf parsley or basil ( (optional))
• ½ cup shredded or crumbled cheese ((such as cheddar, provolone, Monterey Jack, mozzarella, feta, Parmesan, or goat cheese))