In a small bowl, mix the cream cheese, chopped herbs, lemon juice, salt, and pepper until smooth and well combined.
Lay out the bread slices and spread each with a layer of herb cream cheese.
Top half the slices with thinly sliced cucumber in a single layer.
Place the remaining slices on top to form sandwiches. Press gently.
Use a serrated knife to slice into triangles or rectangles.
Garnish with flaky sea salt or microgreens if desired. Serve immediately or refrigerate for 20–30 minutes before serving.