Gluten Free & Keto Three-Cheese Blackberry Focaccia

Ingredients

• 1 egg (at room temperature)
• 1 1/2 teaspoon baking powder
• 1/2 teaspoon kosher salt
• 2 teaspoons apple cider vinegar
• 2 teaspoons active dry yeast
• kosher salt (to taste)
• 180 g ricotta cheese
• 1 red onion (thinly sliced)
• 144 g almond flour
• 2 egg whites (at room temperature)
• 13 g extra virgin olive oil
• 2 teaspoons maple syrup (or honey, to feed the yeast (NO SUGAR WILL BE REMAIN POST BAKE)*)
• 80 ml water (lukewarm between 105-110°F)
• 28 g psyllium husk (finely ground)
• 1 1/2 teaspoon xanthan gum (or 1 tablespoon ground flax seeds**)
• 60 g parmesan cheese (i.e. Parmigiano Reggiano )
• 1/2-1 round mozzarella di buffala (to taste (I use half!))
• 230 g blackberries (fresh or frozen)
• basil leaves (to garnish)
• balsamic vinegar (or red wine vinegar, to serve)
• extra virgin olive oil (to serve)