Super Beef Burgers

Ingredients

• 8 pieces crispy bacon
• 4 thick slices of cheddar
• 4 pieces of lettuce
• 2 tomatoes, sliced
• 4 gherkins sliced
• 1 red onion, halved and thinly sliced
• a little butter for the rolls
• 1 1/2 cups almond flour or ground almonds
• 5 tbsp psyllium husks
• 2 tsp baking powder
• 1 tsp salt
• 3 egg whites
• 1 1/2 tbsp white wine vinegar
• ⅞ cup boiling water (quite specific)
• 1 egg, beaten, for brushing
• 1 tbsp sesame seeds (optional)