Lemon Curd, besides being the perfect filling for carrot cake, and topping for biscuits, french toast, etc, is also a great ingredient to have on hand when you are making a sauce. Here's an example: when I grill chicken, a nice "after-grill" glaze is a mix of soy sauce, lemon curd, ginger, minced garlic, diced green onions, and sesame seeds.
Also, when gently heated it is lovely for a topping over peach pie a la mode.
Another: bake a gingerbread, and just when it comes out of the oven, poke holes with a skewer about every 1/2" and spread the lemon curd over it, making sure it leaks into the holes.
One more thought - dark chocolate and lemon is a favorite of mine - try topping your brownies with this stuff and you will have a hit!