Rinse the spinach well in cold water to make sure it's very clean. Spin it dry in a salad spinner, leaving just a little water.
In a very large pot or Dutch oven, heat the olive oil and sauté the garlic over medium heat for about 1 minute, but not until it's browned.
Add all the mushrooms to the pot, toss with the garlic, Bestlife™ Spread and oil, cover the pot, and cook it for 2 minutes.
Add all the spinach to the pot, toss it, cover the pot and cook it for another 2 minutes.
Uncover the pot, turn the heat on high and cook the spinach for another minute, stirring with a wooden spoon. Cook until all the spinach is wilted. Using a slotted spoon, lift the spinach to a serving bowl. Sprinkle with salt to taste. Serve hot.