Put the Peanut Butter Gaucho crumbs, melted butter and salt in another small bowl and stir with a fork just until crumbs are moistened. Press the crumbs evenly over the bottom and up the sides of the spring form pan (they should go up about 2 inches on the sides). Freeze the crust for 10 minutes.
Working with a stand mixer fitted with the whisk attachment or with a hand mixer in a large bowl, whip 2 cups of the cream until it holds medium peaks. Beat in ¼ cup of the confectioners sugar and whip until the cream holds medium-firm peaks. Scrape the cream into a bowl and refrigerate until needed.
Wipe out (do not wash) the bowl, fit the stand mixer with the paddle attachment if you have one, or continue with the hand mixer, and beat the cream cheese with the remaining 1 cup confectioners sugar on medium speed until the cream cheese is satiny smooth. Beat in the peanut butter, and the milk.
Using a large rubber spatula, gently stir in about one quarter of the whipped cream, just to lighten the mousse. Still working with the spatula, stir in the crunchy peanut mixture, then gingerly fold in the remaining whipped cream. Fold in the mini chocolate chips.
To Finish The Torte: put the chopped chocolate in a heatproof bowl and set the bowl over a saucepan of simmering water. Leave the bowl over the water just until the chocolate softens and starts to melt, about 3 minutes; remove the bowl from the saucepan.
When the ganache is firm, remove the sides of the Springform pan; it is easiest to warm the pan with a hairdryer, and then remove the sides, but you can also wrap a kitchen towel damped with hot water around the pan and leave it there for 10 seconds. Refrigerate until ready to serve.