Zucchini & Portabello Mushroom Stir Fry

Holy cow! This was such a great dish - my husband asked me when I was going to make it again, even though I just made it two days ago.
This takes a slightly Asian twist on zucchini and is so easy and healthy.
Truly a 15 minute dish.

2 medium zucchinis

1/2 yellow onion, chopped

1 portabello mushroom, sliced, coarsely chopped

1-2 T. soy sauce

1-2 T. grated fresh ginger

2 t. sesame seeds

Using a grater, thinly slice zucchinis. 

Place in cast iron pan, with a small amount of water (so they don't initially stick). Add onions and mushroom pieces and cook over medium high heat, stirring occasionally, until ingredients become tender and translucent.  

Add soy sauce, and grated ginger, and cook down to reduce the liquid. Add sesame seeds, salt and pepper to taste and serve warm.