Steam the clams: Warm olive oil; sauté garlic until fragrant. Add parsley and white wine; simmer briefly. Add clams, cover, and steam on medium‑low until shells open. Discard any that stay closed.
Hollandaise: Strain the clam liquid and whisk a few spoonfuls into your hollandaise to season and thin slightly.
Prosciutto chips: Bake thin slices on parchment at 325 °F for 10–12 minutes until crisp; cool.
Serve: Arrange clams on a warm platter. Spoon a ribbon of hollandaise over each and garnish with a prosciutto shard. Serve immediately.