This doesn't look like much, but the first version went by so fast I'm thinking about making it again tonight. It's from the rich tradition of Spanish escabeches and salpicóns and all other manner of marinated and pickled fish, served cold or at room temperature. Obvs wild salmon is not a requirement here, just any slightly oily fish that really tastes like something on its own. If you are using wild salmon, Kalamatas were key, I wouldn't substitute another olive.
wild salmon in olive escabeche.
2 medium carrots, cut into 1/4-inch-wide, 2-inch lengths
1/4 cup extra-virgin olive oil, plus more for frying
1 sweet onion, thinly sliced
2 tsp dried thyme
4 to 8 bay leaves (8 if they're good ones)
3 garlic cloves, thinly sliced
1/4 cup plus 2 tablespoons red wine vinegar
Salt and freshly ground pepper
4 wild salmon filets (about 500g total)
1/2 cup kalamata olives, chopped very fine
This is kind of how you do it, not my instructions yet, they're still the original Food & Wine instructions. You'll be able to tell when they're mine because the words "shimmering" and "dollop" will be gone. Probably also "spooning".
Using a mandoline, cut the carrots into thin strips. In a small skillet, heat 1/4 cup of the olive oil. Add the carrots, shallots, thyme sprigs, bay leaves and garlic and cook over moderate heat until the vegetables are softened, about 6 minutes. Remove from the heat. Stir in the vinegar and season with salt and pepper. Let stand for 10 minutes.
In a large nonstick skillet, heat 1/4 inch of olive oil until shimmering. Season the mackerel fillets with salt and pepper and add them to the skillet skin-side down. Cook over high heat until the skin is browned and crisp, about 4 minutes. Turn and cook the fillets for 1 minute longer, until almost cooked through. Transfer the fillets to a large, shallow glass or ceramic dish, skin side up. Top with the vegetables and their marinade. Let stand at room temperature for 3 hours, occasionally spooning the marinade over.
Discard the thyme sprigs and bay leaves. Arrange the mackerel on plates and spoon the vegetables and their marinade on top. Dollop with the tapenade and serve.