Parsnip and apple loaf with oaty crumble topping

Ingredients

• Oaty crumble topping
• 1 1/2 tablespoon butter
• 1/4 cup brown sugar
• 1 teaspoon cinnamon
• 1/2 cup rolled oats
• 125 gram butter
• 1 cup parsnip, peeled and grated
• 2 medium apples, unpeeled and grated
• 1 cup sugar
• 1 egg
• 1 1/2 cup plain flour
• 1 teaspoon baking soda
• 2 teaspoon cinnamon
• 1 teaspoon allspice