Savory Buckwheat Crepes Recipe

Name: Savory Buckwheat Crepes Recipe
Ingredients: 150g buckwheat flour (5.3 ounces; about 3/4 cup plus 3 tablespoons); 100g all-purpose flour (3.5 ounces; about 3/4 cup, spooned); 7g kosher salt (1/4 ounce; about 1 1/2 teaspoons); 1 large egg; 300ml (1 1/4 cups) whole milk; 325ml (1 1/3 cups) water; Unsalted butter, for cooking; Optional: fried eggs, grated Gruyère cheese, and thinly sliced ham, for filling