In a small bowl, whisk the pudding mix with the milk for 2 minutes. Let sit for 2 minutes to thicken. Spread half of the pudding on the trifle. Repeat all layers - cake, strawberries (mashed and sliced), bananas, pineapple, Jello, and pudding. Top with Cool Whip. Serve immediately or refrigerate until serving. *Optionally, you may add 1/4 c toasted slivered almonds to the top when serving.