Grilled Salmon-and-Lentil Tacos with Spicy Pickled Onions

• 3 red onions (1 pound), thinly sliced
• 1 cup apple cider vinegar
• 1/2 cup sugar
• 4 dried chiles de arbol, lightly crushed
• 1 teaspoon kosher salt
• 1 cup green (du Puy) lentils, picked over
• 4 garlic cloves, crushed
• 1 teaspoon kosher salt
• 1 dried chile de arbol
• 1/4 cup extra-virgin olive oil
• Kosher salt
• Pepper
• 3 Hass avocados, pitted and peeled
• 2 tablespoons fresh lemon juice
• Canola oil, for brushing
• 1 1/2 pounds skin-on center-cut salmon fillet
• Warm corn tortillas and hot sauce, for serving

1. Make the pickled onions Put the onions in a heatproof medium bowl.
2. In a medium saucepan, combine the vinegar with the sugar, chiles, salt and 1 1/2 cups of water and bring to a simmer over moderate heat, stirring, until the sugar dissolves, about 2 minutes.
3. Pour the brine over the onions, cover and let stand for 1 hour.
4. Discard the chiles.
5. Meanwhile, make the tacos In a medium saucepan, combine the lentils with the garlic, salt and chile and cover with 2 inches of water.
6. Bring to a simmer and cook over moderate heat until the lentils are tender, about 15 minutes.
7. Drain the lentils; discard the chile and garlic.
8. Transfer the lentils to a bowl.
9. Add 2 tablespoons of the olive oil, season with salt and pepper and toss to coat.
10. In a medium bowl, mash the avocados with the lemon juice and season with salt.
11. Light a grill or preheat a grill pan and brush with canola oil.
12. Rub the salmon with the remaining 2 tablespoons of olive oil and season with salt and pepper.
13. Grill over moderate heat, turning once, until just opaque throughout, 6 to 8 minutes per side; transfer to a platter.
14. Serve the salmon and lentils with the mashed avocado, pickled red onions, warm corn tortillas and hot sauce.

red onions, apple cider vinegar, sugar, arbol, kosher salt, green, garlic, kosher salt, arbol, extravirgin olive oil, kosher salt, pepper, avocados, lemon juice, canola oil, center, corn tortillas

Taken from www.foodandwine.com/recipes/grilled-salmon-and-lentil-tacos-spicy-pickled-onions (may not work)