You would think that the key ingredient in this ice cream would be the fragrant fennel pollen, but it's actually the agave nectar. It makes for a featherlight custard and a sweetness that recedes to the shadows, allowing all the attention fall on the berries. The fennel does its work, too, and we liked how gluttonforlife let it infuse the ice cream without overpowering it. If you can't get fennel pollen, don't sweat it -- just add ground anise seed or fennel seed in the same proportion.