Preheat the oven to 200°C / 400°F.
Lightly grease an oven‑safe skillet or baking dish with a little oil or butter.
In a mixing bowl, combine the oats, eggs, salt, black pepper, dried garlic and milk, stirring until everything is well mixed.
Finely chop the fresh parsley and stir it into the mixture.
Let the mixture rest for about 5 minutes so the oats can absorb some of the liquid and thicken.
Pour the mixture into the greased skillet or baking dish and spread it into an even layer.
Sprinkle shredded mozzarella evenly over the top.
Bake at 200°C / 400°F for about 15 minutes, or until the eggs are set and the cheese is melted and lightly golden.
Remove from the oven and let it cool for 1–2 minutes.
Slice and serve warm.