Brush or lightly rinse the mushrooms if necessary. Chop the stalks into small pieces and finally dice the mushrooms.
Add the mushrooms to a microwave-safe bowl and sprinkle with garlic powder. Add a tablespoon of water and microwave for 3 to 4 minutes, covered with a microwave-safe plate.
Whilst the mushrooms are cooking, add 100-150 ml milk to your oats and stir.
Using a tea towel or oven gloves, remove the cooked mushrooms from the microwave and set aside. Microwave oats for 3 minutes on high.
When the oats are cooked, stir in your mushrooms and season with oregano, thyme, and chili powder if using.
Slice a tomato and decorate oats as desired. Grate or crumble your chosen cheese overtop, season with salt and pepper to taste, and return to the microwave for 30-60 seconds.
OPTIONAL: Serve up with your favourite protein! I actually mixed tuna in with this just like you might pasta – it's delicious, trust me.
Now indulge and enjoy your easy oatmeal with cheese!