To a large pot of boiling water, add some salt and the dandelion greens. Cook until bright green, 2 to 3 minutes. Remove the greens with a spider and drop them in a bowl full of ice water to stop the cooking.
Add the olive oil to a large saute pan over medium-high heat. Once hot, add the garlic and saute until fragrant, about 1 minute. Add the greens and toss until warmed through. Season with salt and pepper.