I have had countless people tell me that missing bread is the hardest thing about sticking with a gluten-free diet. So, I set out on a quest to make a version that is satisfying when toasted for breakfast and hearty enough to be used for sandwiches. This bread is even better when it's sliced and toasted in a pan with a touch of butter or olive oil until it's lightly golden.
For the onion topping: Heat a large saute pan over medium heat. Once the pan is nice and hot, add the coconut oil and the onions and stir frequently until translucent and fragrant, 7 to 10 minutes. Set the onions aside. Combine the poppy seeds, sesame seeds and sea salt in a small bowl.
For the bread: Preheat the oven to 375 degrees F. Line a 9-by-5-inch nonstick loaf pan with parchment paper, leaving a 2-inch overhang on the 2 long sides of the pan. This will make it much easier to lift the bread out of the pan. Spray with cooking spray.
In a small mixing bowl, whisk together the almond flour, baking powder, dried onion flakes, poppy seeds, toasted sesame seeds, fine salt, baking soda and caraway. Set aside.
In the bowl of a stand mixer fitted with the whisk attachment, add the egg whites and cream of tartar (if you don't have a stand mixer an electric beater will suffice). Whisk the egg whites until stiff peaks form, about 3 minutes.
In a large mixing bowl, whisk together the egg yolks, coconut oil and lemon juice. Add the dry ingredients to the wet egg mixture in 3 small batches, making sure to thoroughly combine the dry mixture and the egg mixture each time. The batter will look like a very thick paste. Don't worry, you haven't done anything wrong. Just make sure to break up any clumps of flour with a rubber spatula to ensure that the dry and wet ingredients are evenly incorporated.
Add a third of the whipped egg whites to the batter and slowly fold them in. This won't be a very easy task, take your time and know that eventually they'll combine. Add another third of the egg whites and fold. Finally, add the remaining egg whites and fold together; there should not be any chunks of batter left but the batter will never completely combine (white and yellow portions will remain).
Pour the batter into the prepared pan. Sprinkle the batter with the sauteed onions and half the seed mixture. Bake until the top is golden brown and a toothpick can be inserted in the center and comes out clean, 30 to 35 minutes.
Let the bread cool in the pan for 10 minutes. Use a knife to release the sides and lift the bread out using the parchment paper. Cool completely, about another 30 minutes.
For the toast: Cut yourself a 1-inch slice of bread and give it a thin coat of cream cheese. Top with a layer of crispy cucumbers, and if you feel like it, top it with some of the reserved seed mixture!
To reheat a slice of bread, add it to a hot pan with a touch of your favorite oil and pan fry both sides for about 2 minutes, so it's lightly crispy and hot.