1. Lightly toast the bread slices. Partially peel the cucumber and cut it into thin strips. Cut the peach into thin slices.
2. Spread the cream cheese on the bread. Arrange the smoked salmon, cucumber strips, and peach slices evenly. Add the salmon roe.
3. Drizzle with olive oil, sprinkle with lemon zest, fleur de sel, white pepper, and chopped dill. Serve immediately, well chilled.