What does Sally sell on the seashore regardless of it’s lack of rarity?

Deep in the soil, I slumber and grow, A ruby-hued treasure that few truly know. Earthy and bold, I color your plate, A hidden delight, both hearty and great. What am I?

I don’t bloom with petals, but I’m green and grow just right. You’ll find me where it’s cool and damp. I unfurl my secrets, not with colour but in coils and spirals. What am I?

Whats round, but not always around. Its light sometimes is dark sometimes. Everyone wants to walk all over me. But only a lucky few have. What am I?

I reflect the world while holding only air. I travel briefly before dying with a touch.