Preheat the oven to 375°F (190°C). Slice the baguette into 1/3-inch slices (cut on the diagonal for small baguettes to make larger slices).
Arrange the slices on a baking sheet and lightly brush both sides with the melted butter.
Bake the bread slices 5 minutes, or until they just begin to turn golden. Remove and let cool to room temperature.
While the toasts cool, mash the cream cheese in a mixing bowl with a fork until smooth. Stir in the finely chopped dill, chopped green onions, and the pressed garlic until evenly combined.
Cut the avocado in half, remove the pit, scoop out the flesh, and slice it. Finely chop any remaining dill or green onion for garnish if desired.
Spread a generous layer of the garlic herb cream cheese over each cooled toast.
Top each canapé with avocado slices, squeeze a little lemon juice over the avocado, and finish with freshly ground black pepper and extra dill or green onion if desired.