Add the peas to boiling water and cook for 5 minutes.: As the peas hit the pot, you will hear a gentle return to the boil and see the water foam slightly, signaling active cooking. The smell is subtly vegetal and sweet, and after five minutes the peas will be tender but still hold shape. This short bath preserves their bright green color while softening them enough to be gently crushed later. If you overcook them, they will turn dull and become mushy, so set a timer and test one for tender bite.
Drain and set aside.: Draining stops the cooking and preserves texture, and the steam rising will smell fresh and green. I often spread the peas on a plate to cool quickly, which keeps them from continuing to cook in residual heat. If you leave them in a colander over hot water, they may get soggy, so move them to a cool container or plate promptly.
Chop the chorizo into small dice and place in a cold large heavy based fry pan.: Placing the diced chorizo sausage into a cool pan lets it warm gradually and render its fat evenly, reducing the chance of burning the edges before the center crisps. As it warms you will smell the deep paprika and spice aromas that define Spanish style chorizo sausage . Uniform dice ensures consistent crisping; uneven pieces will brown at different rates and can produce both burnt bits and underdone centers.
Place the pan over a medium heat, stir occasionally and cook until it is crispy and has released its oils.: The pan will start to sizzle softly as the fat renders, and the chorizo sausage edges will darken and curl slightly, producing crunchy bits. That released oil becomes a flavor reservoir for the dish, so watch carefully and stir to promote even browning. A common misstep is cooking too hot, which can char the surface and leave the interior soft, so maintain medium heat for steady rendering.
Remove the chorizo from the pan with a slotted spoon, leaving the oil behind.: Lifting the crisped chorizo sausage out with a slotted spoon preserves the flavorful oil in the pan while transferring the crunchy pieces to a bowl. The scent left in the pan will be deep and smoky, a great base for the rest of the dish. If you scrape and remove too much oil, you lose that seasoning power, while leaving burnt bits behind will make later steps bitter, so be selective when skimming.
Season the salmon with salt and pepper.: Seasoning the surface of the salmon draws natural flavors forward and helps form a savory crust during searing. Use salt sparingly and a light dust of ground white pepper for a gentle peppery note. The skin side should be patted dry before seasoning, because moisture will create steam and prevent crisping. Over seasoning can mask the fish's natural flavor, so adjust carefully.
Turn the heat up to high and cook the salmon skin side down for 2 minutes until the skin is crispy.: When the pan is hot you will hear a lively sizzle as the salmon hits the surface, and the skin will go from dull to glossy to deeply crisp within a couple of minutes. The aroma becomes savory and toasted, and you should see the edges change color as the flesh cooks through from the bottom. Press gently with a spatula to ensure full contact with the pan. If the pan is not hot enough, the skin will stick instead of crisping, so let the pan preheat properly.
Flip the salmon and cook for a further 4 minutes.: After flipping, the flesh will release a fragrant, warm aroma and the surface will blister slightly. This second sear seals juices and brings the center to a tender, flaky finish. Cooking time can vary with thickness, so look for a translucent band near the top that shrinks toward the center as it finishes. Common mistakes are overcooking until the fish becomes dry, so test for flake with a fork near the end of the interval.
Transfer salmon to a warmed plate, tent it with foil and set aside.: Resting the salmon under a loose tent lets carryover heat finish the internal cooking while keeping the fillet warm. The skin stays crisper when not stacked, and the juices settle evenly, resulting in moist flakes. Leaving it too long under foil may soften the skin from trapped steam, so serve within a short window after resting.
Peel and finely chop the shallot, add it to the fry pan along with the olive oil and cook for 2 minutes until translucent.: The quick sauté of the minced shallot in the reserved chorizo sausage oil and the small amount of olive oil releases a sweet, aromatic fragrance and forms the fragrant backbone of the pea mixture. You will see the bits soften and turn glassy, and the smell becomes mellow and slightly sweet. Cook just until translucent so the shallot retains brightness, overcooking will produce a flat, caramelized tone that competes with the peas .
Add the chorizo and peas to the pan and stir to heat through.: Returning the crisp chorizo sausage and the blanched peas to the pan blends their textures and flavors, and the heat coaxes the oils to coat the veg so every bite tastes unified. The peas will steam briefly and pick up the spicy notes in the pan, and the sizzle should be gentle rather than aggressive. Avoid vigorous stirring which can mash the peas , instead fold gently to warm through.
Take a fork and lightly crush the peas with a fork.: Lightly crushing some of the peas creates a textured, saucy bed that clings to the salmon , with bursts of whole peas for contrast. The aroma will be sweet and savory combined, and the mouthfeel more interesting than leaving them whole. Overly mashing them creates a uniform paste, so aim for a rustic, slightly chunky finish.
Serve the seared salmon on a bed of peas and garnish with a wedge of lemon.: The final plate is a marriage of textures, the crisped skin against the tender salmon flesh and the sweet peas studded with crunchy chorizo sausage . A squeeze of fresh lemon just before eating brightens the entire dish and cuts through the richness. Serve promptly so the contrasts remain distinct, as prolonged waiting softens the skin and blunts the fresh citrus lift.