Mexican Bean Burger | Birds Eye

Ingredients

• 1 bag
• 2 large potatoes
• 1 sprig fresh rosemary
• 2 egg yolks
• 5 twists black pepper
• 1 medium diced onion
• 1 crushed garlic clove
• 2 teaspoons olive oil
• 4 brown rolls
• 1/4 head lettuce
• 1 thinly sliced courgette
• 1 medium sliced red onion