Salmon Cakes With Lemon, Dill, And Homemade Dijon Mayonnaise

["Combine egg yolk, Dijon mustard, and lemon juice in a blender. Blend on high, leaving the lid partially open, until smooth. With motor running, slowly pour in oil in a thin stream; blend until combined. Season to taste with salt and more lemon juice, if desired. Set aside 1/3 cup for salmon cakes. Stir dill into remaining mayonnaise. Place in small bowl; cover and chill.", "Salmon Cakes", "Preheat oven to 400u00b0. Brush salmon with oil. Place salmon in an 8x8"" baking dish and bake until flesh is just opaque, about 12 minutes; let cool. DO AHEAD: Salmon can be cooked 1 day ahead. Wrap in plastic and keep chilled.", "Place potatoes in a medium saucepan; add water to cover by 2 inches and season with salt. Bring to a boil over high heat; reduce heat and simmer until potatoes can be easily pierced to the center with the tip of a knife, 5-10 minutes. Drain potatoes and pass through ricer into a large bowl; set aside.", "Remove any bones and skin from cooked salmon and discard; place flesh in a medium bowl. Using a fork, gently pull apart fish into large flakes. Line a baking sheet with parchment paper; set aside.", "Lightly beat egg and egg yolk in a small bowl to blend. Stir egg mixture, dill, scallions, lemon zest, and 1 tsp. salt into reserved potato puree until just combined. Fold in reserved 1/3 cup Dijon mayonnaise and flaked fish. Season to taste with salt and black pepper or red pepper flakes, if desired. Using a 1/3-cup measuring cup, scoop mounds of batter onto prepared baking sheet. Cover loosely with plastic wrap and chill for at least 1 hour and up to 4 hours.", "Heat a large skillet or a griddle over medium-low heat; coat surface with 1 Tbsp. oil. Shape salmon cakes into 1/2-inch-thick rounds. Working in batches, wiping skillet clean after each batch, and coating skillet with 1 Tbsp. oil each time, cook salmon cakes, gently flipping with a flat spatula halfway through, until lightly browned, about 5 minutes per side. Serve with remaining Dijon mayonnaise alongside."]