Best Smoked Salmon Toast | Healthy Breakfast Idea

Ingredients

• ½ mediumred onion, thinly sliced
• 120 ml (½ cup)apple cider vinegar
• 120 ml (½ cup)water
• 12 g (1 tbsp)granulated sugar
• 5 g (1 tsp)kosher salt
• 4 thick slicessourdough bread
• 2 largeripe Hass avocados
• 15 ml (1 tbsp)freshly squeezed lemon juice
• 0.5 g (¼ tsp)freshly cracked black pepper
• 3 g (½ tsp)kosher salt
• 227 g (8 oz)high-quality cold-smoked salmon
• 30 ml (2 tbsp)fresh dill, finely chopped
• 30 ml (2 tbsp)fresh chives, finely sliced
• For drizzlingextra-virgin olive oil
• A pinch, for finishingflaky sea salt

Instructions

1. 1

   Pickle the onions

   In a small saucepan, combine the apple cider vinegar, water, sugar and 1 tsp kosher salt. Bring the mixture to a simmer, stirring until the sugar and salt dissolve. Pour the hot brine over the sliced red onion in a jar and leave for at least 20 minutes.

2. 2

   Mash the avocado

   Put the avocado flesh in a medium bowl with the lemon juice, ½ tsp kosher salt and black pepper. Mash gently with a fork, leaving the mixture slightly chunky.

3. 3

   Toast the bread

   Drizzle olive oil into a skillet over medium heat. Toast the sourdough slices for 2–3 minutes per side, until golden brown and crisp.

4. 4

   Spread the avocado

   Spread a generous layer of avocado mash over each slice of warm toast.

5. 5

   Add salmon and herbs

   Drape 2 oz smoked salmon over each slice. Top with pickled red onion, dill and chives, then add a drizzle of olive oil and a pinch of flaky sea salt. Serve immediately.

What is smoked salmon toast?

Smoked salmon toast is a simple breakfast or brunch built around bread topped with salmon and complementary flavours. This American-style version brings together creamy avocado, tangy quick-pickled onion and fresh herbs.

The contrasting textures make it work: crisp sourdough holds a soft avocado layer and silky salmon, while the onion adds a sharp, crunchy note.

Nutrition and macros by portion

The nutrition label shows one serving as written: 400 calories, 17g protein, 42g carbs, 19g fat.

The sourdough supplies most of the carbohydrates, while avocado and olive oil contribute much of the fat; the smoked salmon provides most of the protein. Pair a slice with fresh vegetables or fruit for a more balanced plate.

Quick-pickled onion

Hot brine: heating the vinegar, water, sugar and salt helps dissolve the seasonings before they meet the onion. Pour it over the thin slices and give them at least 20 minutes to soften and turn tangy.

Thin slices: evenly sliced onion takes on the brine more readily than thick pieces. Drain off excess brine before topping the toast if you want to keep the bread crisp.

Choosing the avocado and salmon

Ripe avocado: choose fruit that yields gently to pressure, so it mashes easily without becoming watery. Lemon juice adds brightness and helps the mash taste fresh.

Cold-smoked salmon: its soft texture pairs well with the avocado, so lay it gently over the mash rather than chopping it into the topping.

Texture and doneness

Chunky mash: stop mashing while small pieces of avocado remain for a more substantial texture. The mixture should spread easily but not run off the bread.

Golden toast: cook each slice for 2–3 minutes per side over medium heat, checking for crisp edges and a browned surface. Toasting in a skillet gives the bread a sturdy base for the toppings.

Timing the assembly

Pickling first: start with the onions so they have at least 20 minutes in the brine while you prepare the other ingredients. The recipe's total time is 35 minutes.

Serve promptly: spread the avocado and add the salmon and garnishes once the toast is warm. Assembled toast is best eaten straight away so the bread stays crisp.

What to serve with it

Fresh sides: serve the toast with sliced tomatoes, cucumber or a simple green salad for a fresh contrast. Fresh fruit also suits the tangy, savoury toppings.

Brunch pairing: coffee or tea makes an easy accompaniment. For a larger spread, add a bowl of fruit or yoghurt alongside the toast.

Recipe notes & tips

• Slice the red onion thinly so it pickles evenly.
• Use ripe but not over-soft avocados for a mash that holds its shape.
• Mash the avocado gently to keep some texture.
• Toast the bread in batches if the skillet cannot comfortably fit all four slices.
• Drain the pickled onion before adding it if it is carrying a lot of brine.
• Add the flaky salt just before serving for a crisp finishing touch.

Variations

• Add cucumber: layer thin cucumber slices under the salmon for extra crunch.
• Use rye bread: toast rye slices in place of sourdough for a deeper, earthy flavour.
• Add chilli: sprinkle chilli flakes over the avocado for a little heat.
• Swap the herbs: use finely chopped parsley in place of dill or chives.
• Make it citrusy: finish with a little lemon zest alongside the lemon juice in the mash.

Common mistakes to avoid

• Over-mashing the avocado: it can become pasty; stop while a few small chunks remain.
• Skipping the onion resting time: the slices need at least 20 minutes in the hot brine to pickle.
• Using low heat for the toast: the bread may dry out before it crisps; cook over medium heat.
• Overloading with brine: excess liquid can soften the toast; drain the onion before topping.
• Assembling too early: the toast can lose its crispness; add the toppings shortly before serving.

How to store

Store leftover pickled onion in its brine in a covered container in the fridge for up to 1 week. Keep avocado mash covered and refrigerated, and store the bread, salmon and herbs separately; assembled toast is best eaten immediately. Toast fresh bread and assemble just before serving rather than reheating the finished toast.

Frequently asked questions