Steps
1. Bring the water or vegetable broth to a boil in a small pot.
2. Add the rolled oats and reduce heat to a simmer. Cook for 5-7 minutes, stirring occasionally, until creamy.
3. While the oats cook, heat olive oil in a small pan over medium heat. Add spinach and sauté until wilted, about 2 minutes.
4. Poach the egg by bringing a small pot of water to a gentle simmer, adding a splash of vinegar (optional), and cracking the egg into the water. Cook for 3 minutes for a runny yolk.
5. Stir the sautéed spinach into the cooked oatmeal and season with salt and pepper.
6. Transfer oatmeal and spinach mixture to a bowl, top with the poached egg.
7. Sprinkle with Parmesan cheese if desired and serve immediately.