In a small pot, bring the water or vegetable broth to a boil.
Once boiling, stir in the rolled oats. Reduce the heat to low and let simmer. If using, add the grated and squeezed zucchini for extra volume and fiber.
Cook for 3–5 minutes, stirring occasionally.
Pour in the egg whites and continue cooking on low-medium heat for another 3 minutes, stirring frequently to prevent sticking.
Season with salt and pepper to taste.
Transfer the oats to a bowl and top with a fried egg, sliced avocado, and a drizzle of olive oil.