Lemon Ricotta Pancakes

These came from a beach-side restaurant in Santa Monica. They are to-die-for delicious! They absolutely melt in your mouth.

4 large eggs, separated
1 1/3 cups ricotta
1 1/2 tablespoons sugar
1 1/2 tablespoons freshly grated lemon zest
1/2 cup all-purpose flour
Melted butter for brushing the griddle
Maple syrup, as an accompaniment

In a bowl whisk together the egg yolks, the ricotta, the sugar, and the zest, add the flour, and stir the mixture until it is just combined. In a bowl with an electric mixer beat the egg whites with a pinch of salt until they hold stiff peaks, whisk about one fourth of them into the ricotta mixture, and fold in the remaining whites gently but thoroughly. Heat a griddle over medium low heat until it is hot enough to make drops of water scatter over its surface and brush it with some of the melted butter. Working in batches, pour the batter onto the griddle by 1/4-cup measures and cook the pancakes for 1 to 2 minutes on each side, or until they are golden, brushing the griddle with some of the melted butter as necessary. Transfer the pancakes as they are cooked to a heatproof platter and keep them warm in a preheated 200° oven.

Serve with fresh blueberries, raspberries, blackberries or strawberries and top with whip cream.