The difference between a basic save-the-date and one that stands out as unique and well thought out can sometimes boil down to font choices and minimalistic design. Visually, some things are best simplified. Artifact Uprising gets that mindset and offers
Blueberry Cheesecake with Blueberry Glaze - no recipe is linked to this, but here is a site that has a similar recipe. They poured half the cheesecake mixture in the pan, did a layer of blueberries, then poured in the rest. The glaze on top is gorgeous.