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1
For the Tomato-Red Pepper Relish: Combine the tomatoes, red pepper, onion, vinegar, oil and salt and pepper to taste in a medium bowl.
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2
Cover and let sit at room temperature while you prepare the rest of the recipe.
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3
For the Spicy Herbed Tzatziki: Smash the garlic cloves, remove the skins and sprinkle with salt.
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4
Work the garlic into a paste by chopping and smearing it into the cutting board with your knife blade.
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5
Put into a medium bowl along with the yogurt, cucumber, feta if using, scallion, Serrano chile, parsley, mint and lemon zest.
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6
Cover and refrigerate until ready to use.
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7
For the Grilled Salmon: Combine the oil oregano, garlic, salt and pepper in a blender and blend until smooth.
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8
Pour the mixture over the salmon in a baking dish and turn to coat.
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9
Cover and marinate for 15 minutes.
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10
Heat a grill pan over high heat.
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11
Remove the salmon from the marinade and season with salt and pepper.
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12
Grill, skin-side down, until golden brown and crisp on the first side, about 5 minutes.
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13
Turn and cook until opaque three-quarters of the way through (medium-well done), about 5 more minutes.
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14
Remove to a cutting board and let cool to room temperature.
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15
Peel off the skin and discard.
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16
Using a fork, break into bite-size pieces.
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17
Put some of the flaked salmon in the lettuce leaves, top with some of the relish and drizzle with the tzatziki.