Preheat the oven to 375°F (190°C).
Place the baguette slices on a rimmed baking sheet and brush the tops lightly with olive oil.
Toast the baguette slices in the oven for 5 to 7 minutes until edges are golden and crisp.
In a medium mixing bowl, whisk the ricotta cheese with the lemon zest until light and aerated.
Spread approximately one generous tablespoon of the ricotta mixture onto each warm baguette slice.
Evenly distribute the chopped pistachios over the ricotta layer.
Drizzle each prepared slice with honey.
Finish with a light sprinkle of flaky sea salt and serve immediately.