BBQ Black Bean Burgers with Harissa Mayo

Ingredients

• 1 can black beans (drained and rinsed)
• 1 & 1/3 cup buckwheat flour
• 1 cup milled flax seeds
• 1 medium red onion (roughly chopped)
• 4 cloves garlic (minced)
• 1 cup chopped chestnut mushrooms
• 1 tsp cayenne pepper
• 1 Tbsp soy sauce
• 1 Tbsp balsamic vinegar
• 1 Tbsp tomato puree
• 1 & 1/2 Tbsp dried sage
• 1 Tbsp dried mixed herbs
• 4 sun dried tomatoes
• 1 tsp onion powder
• 1 tsp cracked black pepper
• Salt to taste
• Additional 1 cup milled flax seeds (for coating)
• A few tsps oil for frying
• 1 jar Sacla vegan free-from mayo (or vegan mayo of your choice)
• 1 tsp dried harissa seasoning or harissa paste
• 1/2 tsp smoked paprika
• 1/2 tsp garlic power
• 1/2 Tbsp onion powder
• A pinch of ground cumin and ground coriander
• 5-6 vegan burger buns
• 3 fresh tomatoes (sliced)
• Fresh lettuce leaves