Bake pie pastry in preheated 400 degree oven for 10 min.. Let cool.
Break cauliflower into flowerets and cut into ½" thick pieces. Should have about 4 cups. Steam about 4 min. until crisp-tender. Drain and cool.
Spread almonds in a shallow pan and toast in 350 degree oven about 8 min.. Place cauliflower in bottom of pie shell and sprinkle with toasted almonds.
Blend eggs, milk and mayo until smooth. Add 1 ½ cups of cheese, pepper and nutmeg, mix lightly. Pour over cauliflower and nuts.
Bake on bottom rack of a 350 degree oven for 30-35 minutes, or until knife inserted in center comes out clean. Cool on rack 10 min. before serving.