Mario Batali's Sautéed Spinach

So, I  like Mario Batali. Why? Because he loves Michigan and has a house Up North. Tonight I was looking for a little something different than my usual stir fry veggies that I make ALL the time. Ran across this recipe and of course had to tweak it (sorry, Mario). However, I did basically use his suggested flavors and it was a hit.

1 pkg. baby portobello mushrooms, sliced
1/2 large red onion, sliced
1 yellow pepper, sliced
1 box baby spinach
1 lemon, get the zest and then squeeze for the juice
2 T red wine vinegar
olive oil

In large skillet or wok, sauté mushrooms in a couple T of olive oil for about 8 minutes or so--adding the lemon zest about half way (4 min). Add the red onion and then the peppers and keep stirring until they begin to wilt a bit--5-6 minutes. Add the spinach and the red wine vinegar and stir all to combine well and wilt spinach (maybe two minutes)--add the lemon juice and serve. yum-O