Lentil Veggie Burger

Ingredients

• 3 tbsp canola oil, divided
• 1 small brown onion, finely chopped
• 1 clove garlic, minced
• Salt and freshly ground black pepper
• 1 cup cooked brown rice
• 210 g cooked green or brown lentils, rinsed and drained
• ½ cup toasted walnuts
• ¼ cup plain flour
• 1 tsp dried basil
• 4 hamburger rolls, toasted
• Lettuce, red onion, tomato, cheese, beetroot, egg, tomato sauce, mustard