I ended up using a hybrid of a couple recipes that people posted here, mostly based on whim and ingredients on hand. The idea of whipping the egg whites before folding into the batter was a great one. These were the lightest waffles I've ever been able to turn out at home. Here's the approximate recipe that I used.
1.5 cups of White Lily flour
2 T Baking Powder
1 Generous Pinch Kosher Salt
1 T Sugar
2 T Malt Powder
3 Eggs Separated
4 T Melted Butter
1 Cup Buttermilk
.5 Cup 2% Milk
1/2 Cup Pecans Crushed
I followed the general directions for most of the posted recipes: Combine dry ingredients, combine wet ingredients (except egg whites), beat egg whites to soft peaks, combine wet and dry ingredients then fold in egg whites & pecans. This recipe made 4 Belgian waffles.
To answer Cathy2's question, I used and old, underpowered Proctor Silex electric waffle iron that I got as a wedding present 25 years ago. I've long wanted to replace it with something better, but it gets so little use that I've never been able to justify the purchase. The fact that my waffle iron heats unevenly is very apparent in the picture below, but looks aren't everything. These waffles tasted great. I topped them with bananas and blueberries and served them along with maple syrup that we picked up in Michigan and some house smoked bacon from Zier's in Wilmette.

Next time, I think I'll use all buttermilk and up the amount of malt and/or add some maple syrup to the batter.
Steve Z.
“Only the pure in heart can make a good soup.”
― Ludwig van Beethoven