Preheat oven to 400 F. In a saucepan, heat water & butter to a rolling boil. Whisk in flour & salt. Stir vigorously over low heat until mixture forms a ball, about 1 minute; remove from heat. Beat in eggs, all at once; continue beating until smooth.
Drop dough by scant 1/4 cupfuls about 3 inches apart onto an ungreased or parchment lined baking sheet. Combine 2 Tbsp milk & egg yolk; brush over tops. Bake until puffed & golden. about 35-40 minutes. Cool away from drafts. Cut off tops; pull out any filaments of soft dough.
Eggnog Fluff Filling
In a large bowl, combine DRY pudding mix, milk, rum extract, nutmeg & ginger. With a mixer blend on low speed; Add whip cream, beating on high speed until soft peaks form, about 1-2 minutes.
Raspberry Chambord Sauce
In a food processor, puree raspberries with water until smooth. Strain into a small saucepan, pressing puree through a mesh. Whisk sugar, cornstarch & liqueur into sauce. Cook all ingredients together over medium high heat until thickened & clear. Remove from heat & add remaining sugar IF DESIRED. Transfer to a non-metalic container, cover & chill until ready to use.
Fill puffs; arrange on serving platter & drizzle with fresh raspberry Chambord sauce. Place remaining sauce in center of cream puff wreath. Serve immediately or cover & refrigerate no longer than 3 hours.