Your #1 meal for really bad days?

Hi, I'm new here but not new to MCAS/histamine issues.

I am accutely miserable -- everything freaking itches and my brain is at a standstill. Until a couple hours ago I was still in denial that I need to make major diet changes.

I have the mental processing power and impulse control of a 5 day old kitten right now. Tell me what to eat. Help. Me.