Starving-Student Spinach and Mushroom Salad

10 ounces of baby spinach
8 ounces of your favorite mushroom, sliced thin
1 medium summer squash or zucchini, thinly sliced
1/4 cup of a dressing made of extra-virgin olive oil, red wine vinegar, salt, and freshly ground black pepper

In a large bow, toss the spinach, the mushrooms, and the squash.

Add the dressing and toss again.

Serve.