Skip to content
RecipeSeeker
Two slices of toast topped with smashed avocado, sardines, red onion and lemon
LunchPescatarian

Sardine & Avocado Toast

The 10-minute lunch that outperforms most dinners: 30g protein, 392mg calcium and 1.2g omega-3s on two slices of toast. Trust us on the sardines.

30g Protein392mg Calcium1.2g Omega-34mcg Vitamin D
Jump to recipePin it
Prep10 min
Cook0 min
Calories473 kcal
Serves2

Key nutrients per serving

By The Recipe Seeker Kitchen

Updated 2026-09-17

Ingredients

2 servings

Instructions

4 steps · about 10 minutes total

  1. Smash the avocado

    Scoop the avocado into a bowl with the lemon juice, olive oil, a pinch of flaky salt and pepper. Smash roughly with a fork — chunky, not pureed.

  2. Toast the bread

    Toast the whole-grain bread until deeply golden and crisp enough to hold toppings without bending.

  3. Assemble

    Spread the avocado thickly on the toast. Lay the sardines over the top — whole fillets look great — then scatter with red onion.

  4. Finish

    Drizzle with a little more olive oil, shower with chili flakes, parsley and flaky salt. Eat immediately, with lemon wedges for squeezing.

Why this helps

Small fish, enormous nutrition

Sardines are one of the most nutrient-dense foods per dollar in the grocery store: complete protein, more calcium than a glass of milk (thanks to the edible bones), vitamin D, B12 and omega-3s. This is the cheapest brain-and-bone food in existence, hiding on two slices of toast.

All about ProteinAll about CalciumAll about Omega-3All about Vitamin D

Nutrition facts

per serving · % DV
  • Calories 473 kcal24%
  • Protein 30g60%
  • Total Carbohydrate 36g13%
  • Dietary Fiber 9g32%
  • Total Sugars 5g10%
  • Total Fat 24g31%
  • Sodium 531mg23%

Vitamins & minerals

  • Iron 4.5mg25%
  • Calcium 392mg30%
  • Magnesium 106mg25%
  • Potassium 824mg18%
  • Vitamin C 8mg9%
  • Vitamin D 3.8mcg25%
  • Vitamin B12 7.1mcg296%
  • Folate 88mcg22%
  • Zinc 2.7mg25%
  • Omega-3 1.2g75%

*Percent Daily Values are based on a 2,000 calorie diet. Values are per serving (recipe makes 2).

Nutrition is an estimate calculated from USDA FoodData Central ingredient data and may vary by ingredient brand, preparation, and portion size.

Questions, answered

Sardines... really?
Really. Good sardines in olive oil are buttery, mild and nothing like the scary tins of lore. With creamy avocado, sharp onion and lemon, they are genuinely delicious — this recipe converts skeptics weekly.
Which sardines should I buy?
Sardines packed in olive oil from Portugal, Spain or Morocco, with minimal ingredients. Boneless and skinless if the texture worries you.
Do I eat the bones?
The tiny bones in canned sardines are soft, edible and a big part of the calcium story — 392mg per serving. You will not notice them.
Can I use tuna instead?
You can, but you lose most of the calcium, vitamin D and omega-3s — the whole point of the sardines. Mackerel is the closest swap nutritionally.
Is this good for meal prep?
Not really — assemble fresh in 10 minutes. You can pre-slice the onion and have everything ready to go.
What bread is best?
A sturdy whole-grain or sourdough that toasts crisp. Flimsy white bread collapses under the toppings.
Are sardines sustainable?
Generally yes — sardines are small, fast-reproducing fish low on the food chain, making them one of the most sustainable seafood choices.
What about the smell?
Good-quality sardines in olive oil smell like the sea, not like a bait shop. The lemon and onion handle the rest. Your coworkers will survive.

Made it? Rate it.

No ratings yet. Be the first to rate “Sardine & Avocado Toast”.

Tap a star to rate.

Same nutrients, different dish

You might also like

All recipes
Miso-glazed salmon fillet over steamed rice with sesame seeds and scallions35 min

560 kcal4 servings

Miso-Glazed Salmon with Rice

Caramelized miso-glazed salmon fillets over steamed rice with sesame and scallions. 2.2g omega-3s, 34g protein and a day's vitamin D. 35 minutes, restaurant-level results.

2.2g Omega-334g Protein12mcg Vitamin D
Baked egg muffin cups with spinach and feta in a muffin tin35 min

300 kcal3 servings

Spinach & Feta Egg Muffin Cups

Grab-and-go baked egg muffins with spinach and salty feta. 22g protein, 1.6mcg B12 and true grab-and-go convenience. A week's breakfasts in 35 minutes.

22g Protein1.6mcg B12160mg Calcium
Spaghetti with sardines, lemon zest, parsley and chili flakes in a bowl30 min

560 kcal4 servings

Sardine Lemon Pasta

Pantry sardines tossed with spaghetti, lemon, garlic and chili. 1.8g omega-3s, 320mg calcium and 5mcg B12. The cheapest fancy dinner you'll ever make.

1.8g Omega-3320mg Calcium5mcg B12