Sauteed Mushrooms on Mixed Greens

I did a demo last year with fresh mushrooms that was very popular everyone asked for the recipe, here it is:
Ingredients:
1 1/2 pounds mixed white and crimini mushrooms, and shiitake mushrooms
5 Tablespoons olive oil, divided
2 Teaspoons grainy mustard
1/4 cup white wine vinegar
1 teaspoon of sugar
salt and fresh ground pepper, to taste
6 cups mixed salad greens, baby lettuce and baby spinach
shredded Fresh Parmesan cheese, to taste

Directions:
Trim stems on white and crimini mushrooms and slice. Remove and discard the stems on the shiitake mushrooms and slice the caps.
In a bowl, combine vinegar, sugar, mustard, salt and pepper. Slowly add in 4 Tablespoons of olive oil, whisking until emulsified.
Set aside.
Rinse and prepare greens in a serving bowl.
Heat 1 Tablespoon olive oil in a large skillet. Add in the mushrooms and cook until golden.
Spoon hot mushrooms over the greens and drizzle salad dressing over everything.
Garnish with Parmesan cheese.