Step 1Roast the peppers over medium-high heat on the stovetop or under a hot broiler, turning occasionally, until blackened and blistered on all sides, about 5 minutes. Place the peppers in a bowl, cover with plastic wrap, and let them steam for 15 minutes.
Step 2Peel the peppers with your fingers and stem and seed them. Finely dice one of the peppers and set aside. In a blender or food processor, purée the remaining pepper. Separate the eggs. Add the egg yolks to the pepper purée, blend well, and pour into a small bowl. Melt 2 tablespoons of the butter and let cool slightly, then stir it into the pepper pur?e. Add the tablespoon of lemon juice and whisk well.
Step 3Sift the flour into a medium bowl, add a pinch of salt and the baking powder, and stir in the pepper purée. Beat the egg whites to soft peaks. Fold about one-fourth of the whites into the flour-pepper mixture, then fold in the remaining whites. Let the batter sit for 30 minutes at room temperature, or cover and refrigerate overnight (bring to room temperature before proceeding).
Step 4Fold the minced chives into the créme fraîche. Cut the sliced salmon into eight portions.
Step 5In a medium skillet, melt the remaining 1 tablespoon butter over medium-high heat. Add the corn and sauté for about 2 minutes. Stir in the cream and the diced pepper, then add the remaining 1 teaspoon lemon juice. Immediately remove from the heat and keep warm.
Step 6Just before serving, heat 1 to 2 tablespoons butter or olive oil in a large skillet over medium heat. Pour in 2 tablespoons batter for each pancake, to make 2 1/2 - to 3-inch pancakes. Cook the pancakes in batches until they've lightly browned on the first side, about 1 minute, then turn and cook for about 1 minute on the second side, adding more butter or oil as necessary to cook the remaining pancakes.
Step 7Place two pancakes on each of four plates. Top each one with a dollop of créme fraîche. Arrange one or two pieces of sliced salmon on each pancake. Place a small dollop of caviar on top of each pancake. Spoon the corn sauce around the pancakes and garnish with the cilantro.