Sardine Avocado Toast (420 Cal, 31g Protein, 100% DV Calcium)

Yes, it is avocado toast. The difference is this version delivers 31g protein, 100% DV calcium, and measurable omega-3s instead of just looking good on a phone screen. The standard brunch version — plain avocado on bread — gives you roughly 4g protein and negligible micronutrient density. Adding a tin of sardines turns it into one of the most nutrient-complete single-plate meals you can assemble without turning on a stove.

Canned sardines with bones provide 380mg calcium per serving — nearly the full daily value — plus 8.9 mcg B12 and 220 IU vitamin D. The avocado adds potassium (more per gram than bananas), monounsaturated fat for carotenoid absorption, and enough fiber to bring the total to 6g. Dulse provides iodine without adding sodium. The fat from avocado and sardine oil together ensures you absorb the fat-soluble vitamins — D, A, and the omega-3 fatty acids EPA and DHA.

If you already make the sardine toast with dulse and capers, this is the rotation partner. Different fat profile, same assembly time. The capers version is leaner at 350 calories; this one trades those saved calories for the avocado’s potassium and fiber.

Ingredients

• 1 can sardines in olive oil, drained (about 4.25 oz)
• 1 large slice sourdough bread, toasted
• 1/2 medium avocado, mashed
• 1/2 tsp dulse flakes
• 1 tbsp fresh lemon juice
• 1/4 tsp red pepper flakes
• 1/4 tsp black pepper
• Optional: 1/2 tsp everything bagel seasoning

1 can sardines in olive oil, drained (about 4.25 oz)
1 large slice sourdough bread, toasted
1/2 medium avocado, mashed
1/2 tsp dulse flakes
1 tbsp fresh lemon juice
1/4 tsp red pepper flakes
1/4 tsp black pepper
optional: 1/2 tsp everything bagel seasoning

Instructions

1. Toast sourdough until golden and rigid enough to support toppings without bending.
2. Mash avocado directly onto the toast with a fork. Spread it edge to edge — this is the base layer that anchors everything.
3. Drain sardines and arrange them over the avocado. Press gently with a fork to flatten slightly, but do not mash them into a paste. You want distinct pieces.
4. Squeeze lemon juice over the sardines.
5. Sprinkle dulse flakes, red pepper flakes, and black pepper over the top. Add everything bagel seasoning if using.
6. Eat immediately. The toast loses structural integrity within a few minutes once the avocado and sardine oil soak in.

CRON Notes

The avocado is not decoration. Half a medium avocado delivers 345mg potassium, 4.6g fiber, and 10g monounsaturated fat. The monounsaturated fat serves a specific function here: it increases absorption of the fat-soluble vitamins D and A from the sardines. This is not a garnish — it is a nutrient vehicle.

Sardine bones are the calcium. The 380mg calcium in this recipe comes almost entirely from the soft, edible bones in canned sardines. Boneless sardines eliminate the primary calcium source. Look for whole sardines packed in olive oil — the bones dissolve during canning and are undetectable in texture. Combined with the 220 IU vitamin D from the same tin, you get both the mineral and the hormone that regulates its absorption.

Sourdough over standard bread. Long fermentation breaks down phytic acid, which otherwise binds calcium, iron, and zinc and reduces bioavailability. A proper sourdough lets you absorb more of the minerals the sardines provide.

Folate from avocado. Half an avocado provides roughly 60 mcg folate — about 15% of the daily value. Combined with the B12 from sardines, you get both sides of the methylation cycle from a single plate. Most people supplement one without considering the other.

Pair this with the cast iron wild salmon for dinner and you cover your omega-3 intake for the day from whole food sources — no fish oil capsules required.