Brush a round ovenproof dish, about 16cm across, with oil. Hi Sue, I'm so glad you picked this recipe, and I can guarantee it's my absolute favourite (and I'm Italian, so I grew up eating frittatas!). Want to make a small frittata but don't have a little pan? Preheat oven to 350°F and spray a non-stick or silicone muffin tin with nonstick spray. Whisk eggs and add in remaining ingredients. Ask a helper to put the dish in the oven for 30 minutes or until the egg is set. Pour the eggs into the other bowl and stir. How to make mini frittatas. Go ahead and use that large one, but be aware that the frittata will be thinner. Preheat oven. Serve with salad and crusty bread. A thinner frittata cooks quicker. Tip everything into the dish.