Assorted mix-ins (such as shredded cheese, diced vegetables,
and cooked and chopped bacon, ham, or sausage)
Grated Parmesan cheese (optional)
Heat your oven to 350º F and coat a 6-cup muffin pan with nonstick cooking spray. Whisk together the eggs, half-and-half, and salt in a medium bowl, then evenly distribute the egg mixture among the muffin cups. Add about 2 tablespoons of mix-ins to each cup, then sprinkle on a bit of Parmesan cheese, if you like. Bake the frittatas until they are puffy and the edges are golden brown, about 20 to 25 minutes. (If necessary, run a butter knife around the edge of each one to loosen them before removing them from the pan.) Makes 6 mini frittatas.