In a food processor, grind cereal into a fine powder. Combine ground cereal, sugar, and salt in medium sized bowl. Stir in the melted butter until thoroughly blended.
Pack mixture firmly into a 9-inch pie pan and press firmly to bottom and sides, bringing crumbs evenly up to the rim.
Chill 1 hour before filling.
With an electric mixer, beat together the cream cheese, yogurt, honey, lime zest, and vanilla until well combined and fluffy, 5 minutes. Spoon into the prepared pie crust and smooth the top. Cover and refrigerate until set, at least 4 hours or preferably overnight.
When ready to serve, top each slice with a dollop of thawed whipped topping, a sprinkling of cereal, and a twist of lime.