Preheat oven to 375°F (190°C). Partially thaw pie shell (about 10 minutes). Pierce pastry bottom with fork and bake 10 minutes.
In skillet, cook asparagus and leek in oil over medium heat until tender, about 5 minutes. Place on bottom of baked pie shell. Top evenly with cheese.
In small bowl, whisk together eggs, Hellmann's® Real Mayonnaise, mustard and seasonings. Gradually whisk in milk until smooth. Pour over cheese in pie shell and bake 35 minutes, on lower rack, or until set and lightly browned.