Boiled vegetables are the humblest dish on the Vietnamese table, yet they are a subtle measure of the cook. A plate of vivid green, sweetly crisp vegetables brightens the whole meal, while yellowed, mushy greens spoil the appetite.
Happily, boiling vegetables well isn’t hard at all; you just need to grasp a few principles about water, heat and timing. This article will show you how to keep vegetables naturally vivid green without any harmful shortcuts.
Bring the Water to a Full Boil and Use Plenty of It
The most common mistake is adding the vegetables before the water has fully boiled. Vegetables need to be dropped into rapidly boiling water so they cook quickly, holding their green color and their crunch. Water that isn’t hot enough cooks them slowly, making them yellow and mushy.
You also need plenty of water, enough to submerge the vegetables, so the temperature doesn’t drop suddenly when you add them. Quickly returning to a boil helps the vegetables cook evenly. For a large amount of vegetables, boil them in several batches rather than cramming them all in at once, which cools the water and cooks them unevenly.
Add a Pinch of Salt to the Boiling Water
A simple, effective folk trick is to add a pinch of salt to the boiling water. Salt helps the vegetables hold a fresher green color and gives them a slight natural depth of flavor. It’s a safe alternative to using unhealthy coloring agents.
You only need about a teaspoon of salt for a pot of water, no more. For some vegetables, adding a few drops of cooking oil to the water also gives them a nicer sheen. These little tricks are entirely natural and easy to apply.
Watch the Timing and Don’t Cover the Pot
Leafy greens cook very fast, in just one to three minutes depending on the type. Water spinach and mustard greens only need to reach just-done and then be lifted out right away; boiling too long turns them mushy and drains their nutrients. Stand by and test for doneness rather than walking off to do something else.
For leafy greens, keep the lid off or only partly on while boiling, since covering traps steam and turns the vegetables yellow. Firm root vegetables like chayote and carrots, on the other hand, need longer boiling and can be covered. Understanding the nature of each type helps you time them more accurately.
Plunge Into Cold Water to Keep the Crunch
This is the restaurants’ secret for green, crisp boiled vegetables. The moment the vegetables reach just-done, lift them out and quickly plunge them into a bowl of cold water, ideally ice water. This sudden cooling stops the cooking process, keeping the vegetables crisp and locking in their green color.
After about a minute in the water, drain the vegetables and they’re ready to plate. This method is especially effective for vegetables you want to keep crisp, like broccoli, green beans and water spinach. If you don’t have ice, plain cold water still improves things considerably compared to letting the vegetables cool on their own.
Make Use of the Vegetable Cooking Water
Don’t rush to pour out the vegetable cooking water, because it’s a sweet, cooling liquid that still holds some nutrients from the vegetables. With water spinach, mash in a dracontomelon fruit or squeeze in some lime and you have an instant bowl of cool, tangy soup, a familiar dish of northern summers.
The cooking water from other vegetables can also serve as a base for soup; season it a little and add some scallions and cilantro and it’s ready to use. It’s a clever way to make the most of things, wasting nothing while adding a soup to the meal without any extra cooking effort.
Special Notes for Each Type of Vegetable
Each type of vegetable has its own best way to be boiled. Water spinach should be boiled over high heat with plenty of water and lifted out the moment it’s done to keep its crunch. Broccoli only needs a quick blanch and then a plunge in cold water to stay vivid green. Root vegetables like kohlrabi and carrots should be cut into even pieces so they cook at the same time.
For vegetables with a sharp or bitter edge, like mustard greens, adding a little salt and boiling to just-done mellows the flavor. Green beans and okra should be boiled just until done to keep their crunch and pretty color. Observing and remembering the character of each vegetable with every cook will help you boil any type well, with no more mushy or undercooked greens.
Boiling vegetables well is a small skill, but it reflects the care you put into a family meal. All it takes is rapidly boiling water, a pinch of salt, careful timing and a plunge in cold water, and you’ll always have a plate of tempting, vivid green vegetables.
For tonight’s dinner, try boiling your vegetables by these principles and notice the difference. A simple plate of fresh, delicious vegetables is sometimes what makes the whole family enjoy the meal most.