Step 1

Place the toasted bread on a cutting board and overlap slices of avocado on each piece of bread, using a quarter to half an avocado for each, depending on the sizes of the avocado and the bread.

Step 2

Sprinkle the avocado with lemon juice, then sprinkle with salt and pepper. Place one large slice of salmon on top, ribboning it to fit. Drizzle with a tablespoon of the Gravlax Sauce. Garnish with some red onion, sprinkle with the dill fronds, salt, and pepper, and serve with extra sauce on the side.

Step 3

Whisk together the Dijon mustard, honey mustard, whole-grain mustard, ground mustard, sugar, and vinegar in a medium bowl. Combine the olive and grapeseed oils in a small measuring cup. Slowly add the oil mixture to the mustard mixture, whisking constantly, until emulsified. Stir in the dill and salt.