How to Slice Onions
As a common kitchen seasoning vegetable, onions are loved for their unique spicy flavor and nutritional value. Mastering the correct handling method can not only improve cooking efficiency but also avoid dietary risks, let's systematically understand the correct way to open onions.
Core Techniques for Handling Onions
Principle of Cold Storage Pretreatment
Chilling the whole onion for 5 minutes can effectively inhibit the activity of allicin oxidase, reducing the volatilization of刺激性 gases. It is necessary to keep it dry during cold storage to prevent moisture from affecting the integrity of the cell structure.
Detailed Explanation of the Three-Cut Positioning Method
The first cut vertically removes the root end, retaining the bottom fiber bundle; the second cut longitudinally divides while retaining the outer protective membrane; the third cut transversely severs the vascular bundles. Using a 0.5cm equal-distance cutting method ensures even heating and is suitable for stir-fried dishes.
Key Points for Eye Protection During Operation
Scientific Combination and Dietary Taboos
Risks of Shellfish Ingredients
The pentavalent arsenic rich in shrimp may react with onion sulfides in the gastric acid environment to form arsenic trioxide. It is recommended to consume with a 2-hour interval, and the single intake should be controlled within 150g.
Taboo of Honey-Based Foods
The glucose oxidase in honey combined with the organic acids in onions can produce hydrogen peroxide, which may cause irritation to the digestive tract mucosa. Both should be consumed with an interval of more than 3 hours.
Interference with Soy Product Absorption
The phytic acid in soybeans and the oxalic acid in onions form complexes, which can reduce the calcium absorption rate by 40%. It is recommended to stagger eating times or combine with vitamin C-rich green peppers to promote mineral absorption.
Correctly mastering the onion handling method and combination principles can not only retain its rich nutrients such as quercetin and prostaglandin A but also avoid health risks. It is recommended to choose between horizontal or vertical cutting methods according to cooking needs, and in daily饮食, pay attention to maintaining a 3-hour eating interval with incompatible ingredients, making this versatile ingredient a real helper in a healthy diet.