Exactly right, well done.
Jack (Straw) is not sad (is not blue) at this thrilling location (Blueberry Hill, where Fats Domino found his thrill) = Strawberry Hill.
Or, if you prefer, EU food surpluses used to be described topographically: wine lakes, butter mountains and the like (though I haven't heard those terms used in years), so a strawberry hill would be a smallish surplus. Produce is I believe a supermarket term for fresh fruit and veg - didn' t want to make it too easy.
All yours, Trackman