Marion's Tuna Bake - Cooking.com.au

Ingredients

• Mashed potato (enough to 3/4 fill a casserole dish)
• 1 tin tuna (420 g)
• 1 cup grated cheese
• 1 cup grated onion
• 1 dessert spoon vinegar (10 ml)
• 1 dessert spoon worcestershire sauce (10 ml)
• 1 egg
• 2 cups cornflakes
• 110 g melted butter