Heat oven to 375 degrees F. On a lightly floured board, roll out the pastry dough 1/ 16-inch thick. Using a 3-inch cutter, cut out 42 circles; re-roll scraps as needed.
Fit circles into bottoms and slightly up sides of lightly greased 2 1/2-inch muffin pans.
Meanwhile, in a medium bowl, mix together ham, chiles, onion, and cheese and divide equally among muffin cups.
In large bowl, beat together eggs, add sour cream and stir until smooth. Spoon about 1 tablespoon into each muffin cup. Bake until puffed and light brown, 20-25 minutes. Cool in pans 5 minutes; lift out. Serve warm or let cool on wire racks.