Mmmmmmmm...perogies...mmmmmmmmm.
That's soul food for Ukes like me (and all other Slavic folk).
Jena, take the extra time and carmelize those onions once in a while. And if you're feeling ultra-decadent, try frying some salted pork fat, cut into fingernail-size chunks. Toss 'em straight into a frying pan. No need for oiling or buttering. (I prefer cast iron but any decent fry pan will do.) Reserve when browned and shrunken. Dump most of the grease and replace with butter or your favourite margarine* and brown those perogies. Re-add the browned pork fat (called "sqvadkey" in Ukrainian - sorta) when the perogs are nearly done.
You'll thank me. Mebbe your heart won't. Mebbe your weigh scales will glare at me. But when you're chewing, eyes closed because they're too glazed to focus on anything anyway, you'll thank me.
Oh, yes.
*Reluctantly converted to non-hydrogenated margarine** instead of butter after my Stupid Heart Attack.
**Except on my birthday. And Christmas. And other people's birthdays.