What If You’ve Been Peeling Away the Best Part of Your Asparagus?

Subscribe to Chef Martin Oswald’s Healing Kitchen Substack. Right now, across Austria, something is happening that most Americans have never seen. Farmers are pulling thick white asparagus spears out of mounded soil, each one grown entirely in the dark, never touched by sunlight, never given the chance to produce chlorophyll. They are as fat as a thumb and pale as bone. And for the next few weeks, they will dominate menus from Vienna to Munich the way lobster dominates a New England summer.Chef Martin Oswald brought a pile of them to today’s live session, and the first thing he did was hold one up next to his pinky finger. It dwarfed it. These are not the thin green stalks you snap at the grocery store. White asparagus is its own vegetable, really, with a milder flavor, a different nutritional profile, and a texture that can go from tender to woody in the space of a few inches.That texture difference is the whole reason most cooks peel them. The lower portion of a white asparagus spear has a tougher outer layer, and the standard European approach is to strip it off with a peeler before boiling the spears in water spiked with sugar, lemon juice, and bay leaf. It works. But it throws away the part of the vegetable where the minerals are most concentrated.Martin’s argument is simple. The minerals in any vegetable travel from the soil upward through the stem. The highest concentration sits in the outer layers. Peel those away and you are discarding the very thing that makes asparagus worth eating in the first place. So he does not peel. Instead, he borrows a technique from a completely different vegetable.He cooks his asparagus the way you cook onions.Think about a raw onion. It is sharp, almost aggressive on the palate. But cook it slowly in a pan, let it sweat and soften and eventually take on a golden color, and all that harshness transforms into sweetness. The French built an entire soup around this principle. Martin applies the same logic to asparagus. He cuts the spears in half lengthwise, adds just enough olive oil to coat the pan (he estimated about 40 calories’ worth, roughly a third of a tablespoon), and lays them flat side down over medium heat.The key is patience. You are not blasting them with high heat. You are watching for a light golden color on the cut surface, something that takes roughly three to four minutes per side, though Martin does not watch the clock. He watches the pan. “If your pan is hotter, the time is not going to help you,” he told me. When the heat is right, the natural sugars in the asparagus caramelize gently, and the bitterness that lives in the unpeeled skin fades the same way it fades in a slowly cooked onion.There is a word for the first stage of that process, and Martin taught it to us today: “suer,” a French culinary term for sweating an ingredient at low heat until it turns translucent. Push past that stage, let the color deepen to gold, and you cross into caramelization territory, where bitterness gives way to sweetness without ever adding sugar. The restaurants add sugar. Martin does not need to.This same technique works with green asparagus. In fact, when you do it with green spears, it is called blistered asparagus. And it works on the grill, too, as long as you keep the heat at medium. Crank the grill to high and you are back to bitterness, plus the added problem of charring, which creates the kind of compounds you do not want on your food.Martin also shared a grilling trick worth remembering as the weather warms up. Instead of drizzling oil over the vegetables and watching it drip through the grates and flame up, take a folded paper towel, dip it in oil, and wipe it directly onto the grill grates. The asparagus goes on dry. It does not stick. It does not flame. Your eyebrows survive intact. (I told Martin he might have already lost a few of his. He did not disagree.)Once the asparagus was golden and tender, the session turned into a salad build. Martin tossed pine nuts into the same pan, letting them pick up a light toast. He added strips of radicchio, which wilted and lost much of their raw bitterness from the residual heat. Then came capers, which I pointed out are one of the richest food sources of quercetin, a potent anti-inflammatory compound. He sliced thin strips of organic lemon rind (not zested, but cut with a knife into little ribbons) and tossed those in too. A scatter of fresh parsley. A sprinkle of hemp seeds for protein.The dressing was crushed strawberries with lemon juice. That was it. No added oil in the dressing. The sweetness of the berries balanced the residual bitterness of the asparagus and radicchio, and the capers pulled the whole thing back toward savory. Martin’s philosophy came through clearly in that moment: whatever you cook, you are always looking for balance between sweet, sour, and bitter. The strawberry dressing was not decoration. It was the counterweight that made the dish work.He plated the warm asparagus mixture over a bed of raw white radicchio leaves and tasted it on camera. The verdict: the capers made it. The asparagus was sweet from the early-season harvest and the slow caramelization. The strawberries were almost too sweet on their own, but the capers and lemon rind pulled everything back into balance.For anyone who wants a heartier meal, Martin suggested building a base layer of cooked lentils or a quick white bean hummus (pureed white beans loosened with their own cooking liquid, seasoned simply) and piling the asparagus salad on top. That turns a light appetizer into a full lunch.We also talked about two bonus ingredients worth seeking out. Radicchio, Martin explained, is extraordinary when grilled. Quarter a head, skip the oil entirely, lay the quarters cut-side down on a medium grill, and let them caramelize without burning. The bitterness fades, a rich sweetness develops, and you end up with something that belongs on a summer table. The Italians, he noted, handle radicchio bitterness differently for risotto. They chop the bitter white base fine and cook it into the rice, where the bitterness disappears entirely, then scatter the red leaves on top raw for color.And then there were the stinging nettles. Martin held up a sad-looking bunch and dared me to touch one. I declined. (I have been stung on runs before. It is not fun.) But once blanched or steamed, the sting disappears immediately, and what you are left with is a green that tastes and cooks like spinach. Martin’s move is to puree blanched nettles into a potato-leek-fennel soup. The color is stunning, the flavor is clean, and the whole thing is built from ingredients you can forage or find at a farmers’ market. If stinging nettles are not available where you live, spinach with garlic makes a fine substitute in the same soup.One more thing about asparagus that caught my attention today. Asparagus is rich in inulin, a type of fermentable fiber that functions similarly to resistant starch. It travels through the digestive system intact until it reaches the colon, where it feeds beneficial gut bacteria. So when Martin talks about keeping the skin on for the minerals, you are also keeping all that prebiotic fiber intact. That is a lot of nutritional value to throw in the compost bin.There was a larger point underneath all the cooking today, and Martin made it without belaboring it. In Europe, people still go out and pick stinging nettles in the spring. They forage for wild asparagus and elderflowers and mushrooms. It is not trendy or unusual. It is just what you do when the season turns. Somewhere along the way, most of us stopped paying attention to what is growing right outside. Maybe the asparagus is a good place to start paying attention again. Get full access to The Habit Healers at drlauriemarbas.substack.com/subscribe