Wilted-Greens Pesto
(the universal sauce)

The best thing about pesto is that it was never really about basil. Traditional pesto is just herbs, nuts, oil, and cheese, blended into a paste. And the word "herbs" is doing a lot of flexible work there. Any leafy green that's going soft in your fridge is a candidate. Spinach, kale, arugula, carrot tops, even wilted basil mixed with parsley — all of them make excellent pesto.

This is one of the most useful fridge-rescue moves in the kitchen. A bag of spinach that's two days from the bin, some wilting flat-leaf parsley, the leafy tops from a bunch of carrots you bought for something else — none of these are dinner on their own, but run through a food processor with garlic, nuts, olive oil, and a bit of hard cheese, they become a sauce that works on pasta, toast, roasted vegetables, grilled meat, eggs, or a spoon.

The formula is flexible. What matters is the ratio: roughly two parts greens to one part fat (oil plus nuts), seasoned aggressively and brightened with acid.

What you need

• 2–3 cups wilting leafy greens — spinach, kale, arugula, carrot tops, chard, wilted basil, or any mix
• 1/3 cup olive oil, plus more as needed
• 1/3 cup nuts — pine nuts, walnuts, almonds, sunflower seeds, whatever you have
• 2 garlic cloves
• 1/2 lemon, juiced
• 1/4 cup grated Parmesan or Pecorino (or nutritional yeast for a dairy-free version)
• Salt and black pepper

How to make it

Step 1: Handle the bitter greens first. If you're using kale, chard, or large amounts of arugula, blanch them first: drop into boiling salted water for sixty seconds, then transfer immediately to cold water to stop the cooking. Squeeze as dry as you can with your hands. This takes the raw edge off bitter greens and brightens the color. Skip this step entirely for spinach, wilted basil, or tender herb-type greens — they don't need it.

Step 2: Toast the nuts. Put the nuts in a dry pan over medium heat. Toss them around for two to three minutes until they smell nutty and have some color. Pull them off the heat and let them cool for a minute. Toasted nuts have more depth than raw ones — this step is worth doing.

Step 3: Blend the base. Combine the greens, cooled nuts, garlic cloves, and lemon juice in a food processor or blender. Pulse about ten times to break everything down into a rough, chunky paste. Don't run it continuously yet — you want to see what you're working with.

Step 4: Stream in the oil. With the motor running on low, pour the olive oil in steadily. Run it until you reach the texture you want: coarser and chunkier for spreading on toast or tossing with roasted vegetables, smoother and silkier for coating pasta. If it seems dry or the blender is struggling, add more olive oil a tablespoon at a time.

Step 5: Add the cheese and season. Add the Parmesan and pulse a few times to combine. Now taste it, and be honest about what it needs. Pesto needs aggressive seasoning — more salt than you think, more lemon if it tastes flat, a tiny pinch of sugar if the greens are very bitter. Get it where you want it.

How to use it

On pasta: toss cooked pasta with a few tablespoons of pesto and a splash of the cooking water to help it coat. On toast: spread it thick and top with a fried egg. On roasted vegetables: spoon over just before serving. On fish or chicken: spread on before roasting for a crust. As a dip: thin it with a little more oil and serve with bread. Mixed into scrambled eggs at the end of cooking. Stirred into soup as a finishing drizzle.

Storing it

Pesto oxidizes — the top will turn a darker color in the fridge. This is fine and doesn't affect the flavor. Pour a thin layer of olive oil over the surface before sealing, and it will keep for about a week. It also freezes well in small portions; an ice cube tray is a useful tool for this.

See also: Garlicky greens pasta in 15 minutes · Wilted greens stir-fry with garlic · Kitchen journal