1. Heat the olive oil in a pan over a gentle heat and add the onion and garlic and cook until soft.
2. Add the mushrooms and simmer for a further 10 minutes until the mushrooms are just soft.
4. Stir in the Alpro Simply Plain, mustard and parsley. Season with salt and pepper. Simmer for 5 minutes and serve. Tasty!
If you're working with mushrooms about the size of an egg you can use an egg slicer. After you brush your mushrooms to remove any dirt, trim away the bottom part of their stems. Open the blades of the slicer and orient the mushroom the way you'd like your slices to go.