**Prepare the strawberries**
In a mixing bowl, toss the sliced strawberries with the granulated sugar. Let them sit for 15 minutes to release their juices (macerate).
**Prepare the pudding**
In another bowl, whisk together the instant vanilla pudding mix and cold milk for 2 minutes, or until smooth and thickened. Let it set for 5 minutes.
**Layer the trifle**
In the bottom of a trifle dish or large glass bowl, add a layer of cubed pound cake. Spoon a layer of macerated strawberries (with their juices) over the cake. Add a layer of vanilla pudding, followed by a layer of whipped topping.
**Repeat the layers**
Repeat the layers (cake, strawberries, pudding, whipped topping) until all ingredients are used, finishing with a layer of whipped topping on top.
**Garnish**
Decorate the top with whole or sliced strawberries and a few mint leaves for a fresh, elegant touch.
**Chill and serve**
Cover the trifle with plastic wrap and refrigerate for at least 2 hours, or overnight, to allow the flavors to meld. Serve chilled.