Deviled Ham and Pecan Tea Sandwiches

Name: Deviled Ham and Pecan Tea Sandwiches
Ingredients: 1/2 pound cooked ham, cut into 1-inch pieces; 1/2 medium onion, quartered; 3 large sweet gherkins; 1/2 cup pecans,toasted and cooled; 2 tablespoons Dijon mustard; 1 teaspoon Tabasco sauce; 1/4 cup mayonnaise; 16 slices firm white sandwich bread; Garnish: chopped parsley and pecans