Vegan Burger with black bean patty & lingonberries

Ingredients

• 4 vegan burger buns
• 100 lingonberry jelly in a glass
• 150 ml plant-based mayonnaise
• 50 g lamb's lettuce
• 4 slices of vegan sliced cheese
• 2 onions
• 4 gherkins
• 1 can of black beans (400 g / 295 g drained weight)
• 1 garlic clove
• 1 onion
• 1 tbsp tomato paste
• 1 tsp soy sauce
• 1 tsp liquid smoke
• 2 tbsp mustard
• 4 tbsp rolled oats
• salt
• pepper
• oil for frying