In our kitchens, one of the most common ingredients we encounter is the onion. Onions are not only great for stimulating appetite and aiding digestion but also enhance the taste of vegetarian dishes. Onion has a blend of spicy and sweet flavours. There are three main types of onions, which are white, yellow, and red onion. Each of them has its unique flavour and culinary uses.
Nutritional value of onions
Onions are rich in nutrition. It has vitamins C, calcium, potassium, and more. These nutrients boost the immune system, combat inflammation, lower blood pressure, have antioxidant properties, and help reduce cholesterol levels.
Cooking tips for onions
- White onions has a high level of sweetness and tender texture. White onions turn a golden colour after long cooking. They are perfect for slow-cooked dishes, baking, and fresh in salads. You can even eat them as a fruit due to their juicy and sweet taste.
- Yellow onions have a spicy flavour. It is versatile and good for frying and baking. Charring them slightly enhances their flavour.
- Red onions have high in anthocyanin. Red onions not only add a pop of colour to dishes but also have a moderate spiciness and a crisp texture. They are great for stir-frying, salads, and baking.
Eating onions raw is a good choice for maximising their antioxidant flavonoids and sulfur compounds. If eating raw, red onions are the spiciest, yellow onions have a medium spiciness, and white onions are the mildest and sweetest.
If preparing hot dishes, let the onions that is already cut sit for about 15 minutes before cooking.
Tips for cutting onions without tears
Cutting onions releases sulfuric compounds that stimulate the tear glands. To minimise tears, you can chill the onions in the fridge or soak them in water for 20 minutes before cutting. Using a sharp knife and cutting quickly will also reduce the release of irritating compounds. Additionally, cutting onions along the reverse grain makes them easier to soften.
How to select onions
When you select onions, it is suggested to look for onions that are smooth, dry, full, and heavy for their size. A heavier onion indicates more moisture. Those with firm tips are usually sweeter. Pressing the top of the onion for firmness can also indicate freshness.
How to store onions
Onions should be kept dry and stored in a cool, ventilated area. It should also be away from direct sunlight. Then, it usually lasts about 2 months. You should avoid storing onions in the refrigerator or near other fruits and root vegetables to prevent them from absorbing odours and shortening their shelf life. Red onions last the longest in storage, while white onions, with their higher moisture content, can last up to a month.
Onions are not just a flavour enhancer for dishes. Onions are also a nutritious and healthy food choice. With the right selection and storage techniques, coupled with simple cooking methods, onions can be a highlight on your dining table.
