Peel and dice onion. Peel and mince garlic. Slice mushrooms.
Add olive oil, vinegar, lemon peel, Italian seasoning, 1/4 tsp sea salt and pepper to a small bowl and whisk.
Wash and dry lettuce. Divide between two bowls.
Remove wilted outer leaves from radicchio and discard. Separate leaves into pieces and divide between bowls.
Heat large pan over medium heat and add a tbsp of water or veg broth.
Add onions and 1/4 tsp sea salt to the pan and saute for about 5 minutes, stirring occasionally.
Add garlic to the pan and saute for about 1 minute.
Add mushrooms to the pan and sauté until soft, about 5 minutes. If the mushrooms start to stick to the bottom of the pan, you can add a little water or vegetable broth a couple of tbsps at a time.
When the mushrooms are ready, add the dressing to the pan and gently heat for a minute or two.
Divide the mushroom mixture between the two bowls and top with some additional black pepper if desired. You can also add some soft cashew based cheese if desired.