Peel the shrimp and remove the veins.
Clean the mushrooms thoroughly and slice them into bite-sized pieces.
Finely chop the onion and garlic.
Add olive oil to a pan, then sauté the onion and garlic.
Add the shrimp and mushrooms, then stir-fry together.
Add oatmeal and water, then bring to a boil.
When the porridge thickens, season with salt.
Add basil leaves at the end and mix well.
Serve in a bowl.