Weekday Dinner: Impossible pies

I'd never heard of these until recently but they seemed like a great way to use my pancake mix, especially as I love quiches and pies (albeit the UK/NZ variety with puff pastry). This week I've been working my way through some variations on fish pie.
Fish pie with cottage cheese, chives aand cheese. Good if a bit salty.
Fish with broccoli and cheese.
Fish with last week's cauli and spinach curry and cheese. Deliciously spicy.