In a large, deep, nonstick pan or pot, heat olive oil. Add garlic and saute for 1 minute.
Add all spinach, salt, pepper and toss with garlic and oil. Cover pan and cook on low for about 1 minute. Uncover pan, turn the heat on high and cook spinach for another minute, or two, stirring with a wooden spoon until all the spinach is wilted.
Using a slotted spoon, lift the spinach into a serving dish or bowl and squeeze with a little fresh lemon all over the spinach.