Light and easy banana and walnut muffins - Starts at 60

Ingredients

• 3 large ripe bananas
• 3/4 cup white sugar
• 1 large egg
• 1/3 cup vegetable oil
• 1 1/2 cups plain flour
• 1 tsp baking powder
• 1 tsp bicarbonate of soda
• 1/2 tsp salt
• 1/2 tsp cinnamon
• 1/4 tsp nutmeg
• 1 1/2 cups chopped walnuts
• 2 tbsp brown sugar
• 1 tbsp melted butter