Heat oven to 400°F Spray 24 regular-size muffin cups with cooking spray. In 3-quart saucepan, heat water and butter over high heat to a full rolling boil. Remove from heat.
Stir in flour, cornmeal and salt (cumin and cayenne if using) until mixture forms a dough and all lumps have disappeared. Gradually stir in beaten eggs until well blended. Stir in both cheeses and the chiles.
Spoon dough evenly into muffin cups, filling each 3/4 full.
Bake 25 to 29 minutes or until golden brown. Cool 2 minutes; remove from muffin cups. Serve warm.