In a blender, combine the buckwheat fl our, milk, eggs, salt, and melted butter or coconut oil. Blend until smooth. Let the batter rest for at least 30 minutes at room temperature. In a small bowl, mix the ricotta cheese with honey until well combined. Adjust the sweetness according to taste and set aside.
Heat a tablespoon of coconut oil or butter in a skillet over medium heat. Add the sliced plums and sprinkle with a little ground cinnamon. Sauté until the plums are tender and caramelized, about 5-7 minutes. Remove from heat and keep warm.
Heat a non-stick skillet or crepe pan over medium heat and lightly coat with butter or oil. Pour about ¼ cup of batter into the pan, tilting it to spread the batter thinly. Cook for about 1-2 minutes until the edges begin to lift, then flip and cook for another minute on the other side. Repeat with the remaining batter.
Spread a generous amount of the honeyed ricotta on half of each crepe, top with sautéed plums, then fold the crepe in half or roll it up. Repeat with the remaining crepes.
Drizzle with additional honey and serve warm, inviting each bite to be a delightful mix of nutty, sweet, and tart flavors.