asparagus - watch the video to see (fresh, trimmed, about one third trimmed off and cut on bias)
salt - 1 tablespoon for boiling water, to taste for mushrooms (for boiling water and seasoning mushrooms)
water - watch the video to see (for boiling asparagus and ice water bath)
ice water - watch the video to see (to stop asparagus cooking and keep vibrant green)
oyster mushrooms - watch the video to see (cleaned, base cut off, larger pieces torn into two or three)
shallots - watch the video to see (sweated in butter)
butter - watch the video to see (for sweating shallots)
black pepper - to taste (to season mushrooms)
heavy cream - watch the video to see (added to mushrooms and cooked covered for 5 minutes)
Parmesan cheese - watch the video to see (grated, blended into reduced creamy sauce)
egg yolk - 1 (one, blended into reduced creamy sauce)
quick puff pastry - watch the video to see (homemade, cut into squares then triangles, two triangles per serving)
balsamic reduction - watch the video to see (for drizzling on top)
toasted pistachios - watch the video to see (for garnish)