Combine coconut and sweetened condensed milk in a large bowl. Add almond paste and next 5 ingredients. Stir in mini-morsels.
Beat egg white at high speed with an electric mixer until still peaks form; fold into coconut mixture.
Drop by heaping tablespoonfuls onto parchment paper-lined baking sheets.
Bake at 325° for 20 to 21 minutes or until edges are golden and tops are lightly browned. Cool completely on baking sheets.
If desired, microwave chocolate morsels and shortening in a 1-cup glass measuring cup on HIGH 1 minute or until melted, stirring once.
Pour melted chocolate into a small zip-top freezer bag. Snip a small hole in 1 corner of bag; drizzle chocolate over macaroons, and sprinkle with toasted almonds, if desired. Let stand until chocolate is firm.