Toast the bread: Preheat the oven to 400°F (200°C).
Arrange baguette slices on a baking sheet and brush both sides with olive oil. Bake 8–10 minutes, flipping once, until golden and crisp.
Add garlic aroma (optional): While the toasts are warm, lightly rub the cut side of the garlic clove over the surface. This adds subtle flavor without overpowering.
Make the cheese spread: In a small bowl, mix the cheese with lemon zest, a pinch of pepper, and a drizzle of olive oil.
If using ricotta, whip it briefly with a fork for extra creaminess.
Dress the arugula: Toss arugula with lemon juice, a tiny splash of olive oil, and a pinch of salt. Keep it light so the leaves stay perky.
Assemble: Spread a generous layer of the cheese mixture on each toast. Top with a small tuft of arugula and a folded ribbon of prosciutto.
Finish: Add a light drizzle of honey or balsamic glaze, a crack of black pepper, and a few flakes of sea salt if you like.
Serve right away: Crostini are best fresh, while the toast is still crisp and the greens are lively.