This is a beautiful, nutritious, and tasty vegetable side dish.  The recipe below has all the ingredients  sautéd.  But you could also combine these raw ingredients, add dressing, and have a lovely salad.

Ingredients:
4 teaspoons olive oil, divided
1  cup of sliced mushrooms, (wiped off with paper towel or mushroom brush)
1/3 cup chopped onion
3 cloves garlic, minced
l large red pepper, sliced into strips
  (or 1/2 cup jarred peppers)
8 cups spinach
  (if raw 4 cups)
1/2 teaspoon salt

Directions:
In a non-stick pan that can handle 8 cups of spinach, add half olive oil and heat to medium high. Add the sliced mushrooms, turn after 2 minutes, sauté another two minutes, remove mushrooms from the pan.  Add the other half of the olive oil, sauté the onion for 2 minutes, add the garlic and red pepper, sauté 3 minutes.  Add the spinach, sprinkle with salt, stir constantly for 2 minutes or until the spinach is done to your preference. Add back the mushrooms and serve.