1 can of sardines (6 to 7 ounces), deboned if you like
ΒΌ small sweet or red onion, thinly sliced
Extra-virgin olive oil, for drizzling
Fresh lemon juice, to taste
Flaky sea salt
Coarsely ground black pepper
Fresh basil leaves, torn (optional)
Instructions:
Toast the bread under a broiler (on both sides) or in the toaster.
While the toast is still warm, immediately rub it (aggressively!) with the cut side of the garlic clove, then spread toast generously with butter. Top butter with tomato slices and lightly salt them.
Top tomatoes with sardines and then onion slices. Drizzle with olive oil and lemon juice, then season with more salt and pepper. Garnish with basil if you like and serve immediately.