Fixie life!

For better results with mushroom identification in the future, try to get photos of the underside and stipe of mushrooms. The more pics the better chances of ID. Providing a rough location can also be beneficial. From what I can tell this mushroom is likely some type of oyster mushroom (Pleurotus sp) or maybe a flat crep (Crepidotus applanatus)

Looks great! I see some hedgehogs, and chanterelles, is that amethyst deceiver on the right?

Check out Gremolata and/or Pangrattato. It's a Mediterranean herb and bread crumb crumble with lemon zest. Sounds like what you're looking for. You can always mold the recipe to your own taste with different herbs.

I have! I had success with bulk poppy seeds from a bakery. I have heard of people using grocery store seeds. You'll want to make sure they're fresh seeds/haven't been sitting in the pantry for years. Depending on where you live, it's best to sow them right before the last frost. What I do to recreate this is to put the poppy seeds in freeze for at least 24 hours before I sow the seeds.