Mexican bean burgers with guacamole

Ingredients

• 1 cup (approx. one 400g tin) black beans, drained and rinsed
• 1 sachet (approx. 30g) taco seasoning
• 1/4 cup extra virgin olive oil
• 1 lime, juiced
• 1/2 cup wholemeal flour
• 1/2 red onion, finely diced
• 1/4 cup fresh coriander, roughly chopped
• 1 large avocado
• 1/4 red onion, finely diced
• 1/4 cup coriander, roughly chopped
• 1/2 lime, juiced
• Sea salt and black pepper, to taste
• 4 wholemeal burger buns
• Cheddar cheese, or a plant-based alternative
• Pickled jalapeños (optional)
• Tomato salsa
• Rocket