Curious Weeds in the Onion Bed

It looks like onions are going to be epic this year. But the weeds are really weird.

The weeds there mostly consist of four things:

• Cilantro that re-seeded itself from last year. 
• Lettuce. Not sure if it re-seeded itself, or roots are just sprouting. 
• Onions from last year.
• Garlic from last year. 

How do you weed the garden bed, when all the weeds are yummy?