Place a medium skillet over medium heat and add the olive oil.
When the oil is hot (but not smoking), add the garlic to the pan. Sautee, stirring occasionally, for one minute until the garlic is aromatic and starting to go golden.
Add the spinach leaves and lemon juice and sautee for another 3-4 minutes. Stir frequently. When the leaves are wilted (but not brown), remove the pan from heat. Season with salt and pepper and serve.