In a mixing bowl, combine the graham cracker crumbs, melted butter, and white sugar until fully blended. Evenly distribute this crust mixture into mini dessert glasses, pressing firmly to create a compact base.

In a separate bowl, use an electric mixer to beat the softened cream cheese and yogurt until smooth. In another bowl, whisk together the condensed milk and key lime juice, then fold into the cream cheese mixture until well blended.

If desired, divide the filling in half and color one portion with green food coloring. Using a piping bag, alternate piping each filling into the glasses, filling until just above the crust.

Place the assembled desserts in the refrigerator for at least 2 hours to allow the filling to firm up properly.

Once chilled, remove the mini desserts and garnish with whipped cream, fresh lime zest, or mint leaves for extra color and flavor.