Brush olive oil onto the sliced baguette and broil for 2 minutes. Watch your oven so they don't get over done. You can add another minute is you want them crispier.
Combine the cream cheese, dill, lemon juice, garlic, salt and pepper in a bowl or a small food processor. Blend or mash with a fork until well combined.
When the baguette slices are done, spread the cream cheese mix onto the crostini. Add a few pieces of arugula on top and a slice of cucumber.
Next layer on the smoked salmon, then the capers and green onion.
Top off with parsley and additional fresh cracked pepper and salt as desired. Serve immediately. Or if you plan to make this before the party, mix the cream cheese spread ahead of time and then cook the bread prior to serving.