Dacha Tactics #76 - Final light straw!!

This is a really cool position I came across. Black to play and win. We are down a queen, but the white king is in a straitjacket. We don't have a light bishop, and his king is on light – that signals to us we need to manufacture some good old homemade light! How? F5 light brick almost works, but alas, en passant. Let's pull through!!

Interact with the puzzle below.  If you get stuck, you can always click the "lightbulb" icon in the lower-left of the puzzle frame.  Good luck!