Preparation: Heat the oil in a skillet. Add the spinach, goat cheese and tomatoes. Cook until spinach wilts.
Mix Eggs: In a bowl, beat the eggs. Season with salt and pepper.
Combine: Pour the beaten eggs into the skillet over the wilted spinach and tomatoes. Stir gently to distribute the ingredients evenly.
Cook: Cover and cook on a low heat until the eggs are set and the cheese is melted.
Serve: Cut the frittata into slices. Serve warm.