Preheat oven to 350°F
Melt butter and whisk together with eggs, vanilla, yogurt and milk
In a large bowl mix together all other ingredients.
Add wet ingredients stir gently until combined.
Grease a 8 X 12 baking dish
Spoon mixture into tray and evenly spread.
Bake for approx. 40 mins until golden and firm to the touch.
Cut into slices and store in an airtight container in the fridge
Serve warmed with berries and cream or just eat as is.