Preheat oven to 375F. Spray both sides of the wonton wrapper with cooking spray and place snugly into muffin pan. Bake for 7-8 minutes until the edges are beginning to get golden brown and crisp. If you are having trouble getting the edges to brown, use tongs to remove the wonton cups and place them directly on the oven rack to bake for 1-2 minutes. They should crisp up nicely.
While the wonton skins are baking, in a large bowl, add the crab meat and mix gently with the lemon juice, salt and pepper. Delicately mix in the cream cheese, mayonnaise and Worcestershire sauce. Taste and add additional salt or Worcestershire sauce if needed.
Spoon about 1 tablespoon of filling into each wonton cup. Return to the oven and bake for an additional 4 minutes (or you may serve as-is, just a little chilled). Garnish with green onion slivers or Mild Chili Threads.