Wash the spinach thoroughly and cut it into appropriate sizes.
Finely chop the onion.
Slice the garlic.
Heat olive oil in a pan and sauté the garlic and onion.
When the onion turns translucent, add oatmeal and stir-fry for 1-2 minutes.
Add spinach and milk, then simmer over medium-low heat, stirring.
When the ingredients are cooked softly and the oatmeal thickens, season with salt and pepper.
Top with Parmesan cheese as desired to finish.