An Unlikely Salad Concoction

I never have any idea what to put in a salad.  I know this much: make your own dressing, that's a given.  Mushrooms are a good bet, as they soak up all the flavor and end up being remarkably delicious.  Leaves: yes.  Good oilve oil and vinegar (or lemon / lime juice).  Salt, fresh pepper.  Avocado if you feel fancy.  Raw onions, just a bit, taste sweet when combined in with the vinegar....