One of the best things about making a large batch of waffles is that they freeze really well. We made quite a bit with the batch recipe below that some were frozen and later toasted briefly during those mornings where we rush through to get out the door to work/daycare. We also found they are delicious when topped with ice cream for a quick dessert when it's too hot (or too lazy) to bake. However you decide to enjoy your waffles, you can make them with other fruits instead of blueberries (like raspberries, blackberries, strawberries, pitted cherries, bananas, peaches, etc) or omit the fruit entirely. But for Joel, blueberries are definitely his favorite (... at least that day it was. His 'favorites' tend to change daily lol.
I also included the GF flour substitutes also taken from America's Test Kitchen, if you prefer to use a store bought GF flour mix such as King Arthur and Bob's Red Mill brand.
GF Buttermilk Blueberry Belgian Waffles
recipe from America's Test Kitchen