The key to this simple salad is slicing the raw asparagus thinly, so it takes on the flavor of the lemony marinade. Slideshow: Asparagus Recipes
In a blender, combine the lemon juice with the scallions, anchovies and garlic and puree until nearly smooth. With the machine on, gradually add the olive oil until emulsified. Season the dressing with salt and pepper. Transfer one third of the dressing to a serving bowl and toss with the asparagus. Refrigerate for 30 minutes.
Meanwhile, in a medium saucepan, cover the eggs with water and bring to a boil. Remove from the heat, cover and let stand for 10 minutes. Drain and cool the eggs under cold running water. Peel the eggs and pat dry, then quarter lengthwise and season with salt and pepper.
Fold the tomatoes into the asparagus; season with salt and pepper. Arrange the eggs on top and serve, passing the remaining dressing at the table.
The dressing can be refrigerated overnight.