In a small saucepan, combine oats, milk, and a pinch of sea salt, and bring to a boil. Reduce to a simmer and cook on low heat for 5-8 minutes, stirring frequently, until all of the liquid has been absorbed and the oats are tender.
In a large frying pan, heat olive oil on medium-high heat. On one side of the pan, crack the egg and allow it to fry and cook to your liking. On the other side of the pan, add kale, cherry tomatoes, crushed chilies (optional), and a pinch of salt and pepper and allow to cook along with the eggs until kale is tender and cherry tomatoes can easily be broken by the touch.
Once the oats are cooked, transfer them to a bowl and top them with the cooked kale, cherry tomatoes, and fried egg. Sprinkle with feta cheese, salt, pepper, and additional toppings of your liking to serve.