It's super-fast and is a really refreshing snack in the summer chill!
- Prep Time : 5 minutes
- Cook Time : 5 minutes
Sprinkle the slices of Portobello mushroom with salt, pepper and a little oil and cook in a hot frying pan or grill for 1 minute on each side until sealed.
Place on a serving dish and sprinkle each slice generously with tuna fish, finely chopped onion and slices of lemon. Serve immediately.
This makes a practical, super-fast snack for unexpected guests.