Ultimate Bacon Keto Buns

Name: Ultimate Bacon Keto Buns
Ingredients: 3/4 cup almond flour (75 g/ 2.7 oz); 2 1/2 tbsp psyllium husk powder (20 g/ 0.7 oz); 1/4 cup coconut flour (30 g/ 1.1 oz); 1/4 packed cup flax meal (38 g/ 1.3 oz); 1 tsp garlic powder; 1 tsp onion powder; 1 tsp cream of tartar or apple cider vinegar; 1/2 tsp baking soda; 3 large egg whites; 1 large egg; 1 cup boiling water (240 ml/ 8 fl oz); 1/4 - 1/3 tsp sea salt; 2 1/2 tbsp sesame seeds (23 g/ 0.8 oz); 5 large slices streaky bacon, halved in length (150 g/ 5.3 oz)