Preheat oven to350°F. Lightly grease cookie sheets; set aside. Heat chocolate and shortening in2-quart sauce pan over low heat, stirring constantly, until melted; remove from heat. Mix in sugar, vanilla and eggs. Blend in flour, baking powder and salt. Stir in 2/3 cup "M&M's"(r) Milk Chocolate Mini Baking Bits. For each cookie, arrange 3 pecan halves, with ends almost touching at center, on prepared cookie sheets. Drop dough by rounded teaspoonfuls onto center of each group of pecans; mound the dough slightly. Bake 8 to 10 minutes just until set; do not over bake. Immediately remove cookies to wire racks to cool completely. Top each cookie with frosting; press remaining "M&M's"(r) Milk Chocolate Mini Baking Bits into frosting to create turtle shell..