1.Fill A Large Pot With Water. Add Sea Salt To Taste, And Bring To A Rolling Boil. Stir In Penne And Return To A Boil. Cook Uncovered, Stirring Occasionally, Until Pasta Is Cooked Through But Still Firm To The Bite, About 11 Minutes. 2.Drain Penne Well, And Reserve 1 Cup Of Pasta Cooking Water. 3.Return Penne And Reserved Cup Of Pasta Water To The Empty Pot And Place Over Medium-Low Heat. 4.Stir Smoked Salmon, Cream Cheese, Dill, Green Onions, Dijon Mustard, Lemon Zest, Lemon Juice, And Black Pepper Into Pasta Until Cream Cheese Is Melted, 4 To 5 Minutes.