White Bean and Egg Sandwich

Ingredients

• 1 tablespoon vegetable oil
• 1 onion, chopped
• 1 garlic clove, sliced
• 3 tablespoons of chili sauce
• 3 tablespoons of harissa
• 3 tablespoons of pineapple sauce
• 1 teaspoon soy sauce
• 7 ounces of canned white beans
• salt
• pepper
• 2 tablespoons of mayonnaise
• 1 ounce butter
• 1 burger bun
• 2 cheddars slices
• 2 eggs
• 1 avocado, diced
• 1 spring onion, chopped