Heat up a sauce pan, add olive oil, then stir fry onion until browning and fragrant, add garlic.
Add button mushrooms and mini shitake mushrooms, this step will make the olive oil absorbs by the mushroom, stir with additional butter
Once the mushrooms are cooked and browning, add miso paste and 1 tbsp of mushroom stock - simmer until the mushrooms have soaked the flavour
Then, add defrosted udon. Add water to help with the moisture, and add another 1 tbsp of mushroom stock, also black pepper and dried basil. Stir and mix well until cooked
Garnish with crispy garlic and spring onion, done!