1. Preheat the oven to 350°. Spread the walnuts in a pie plate and bake for about 10 minutes, or until lightly browned. Let cool, then finely chop.
2. In a medium bowl, mix the olives, walnuts, olive oil, anchovies and garlic.
3. Spread each slice of toasted baguette with 2 teaspoons of the goat cheese and top with 1 tablespoon of the olive mixture. Arrange the crostini on a platter and serve.