Use an oven-safe skillet: A cast iron or other oven-safe skillet is essential for moving the frittata from stovetop to oven without transferring dishes.
Start on the stovetop: Cooking the frittata briefly on the stovetop helps set the edges and prevents the center from overcooking in the oven.
Avoid excess moisture: Sauté vegetables until tender and any liquid has cooked off to prevent a watery frittata.
Let it rest before slicing: Allow the frittata to cool for about 5 minutes so it sets fully and slices cleanly.
Season thoughtfully: Eggs need enough salt to bring out flavor, so taste and adjust seasoning before baking if needed.