Sweetness of Onions

Today, I will talk about onions.

Onions is the most sweet vegetable in the world, which includes fructose, glucose and sucrose.

However, since allyl sulfide included in onions is too strong pungent component, you will feel that raw onions are gingery.

Allyl sulfide is highly volatile, and this will be reason to cry when you cut onions.

Also, if you heat allyl sulfide, it will become propyl mercaptan, which has a high sugar content.

Although propyl mercaptan has fewer calories, it's said that the sweetness is 50 times as sweet as sugar.

Onions are an excellent ingredient that is delicious and nutritious if you cook it properly.

玉ねぎの甘さ

今日は玉ねぎについて話します。

玉ねぎは野菜の中で最も糖質が多く、果糖・ブドウ糖・ショ糖などを含んでいます。

しかし、辛味成分である硫化アリルなどイオウ化合物の刺激が強すぎるため、生で食べると辛さしか感じません。

硫化アリルは非常に揮発性が高く、玉ねぎを切る時に涙が出るのはこの成分が原因です。

また、硫化アリルは加熱すると、糖度の高いプロピルメルカプタンに変化します。

プロピルメルカプタンは低カロリーですが、砂糖の50倍の甘さを持つと言われています。

玉ねぎは、適切に調理すれば、非常に美味しく栄養価の高い料理を作ることができる優れた食材です。

• Today, I will talk about onions.
• This sentence is perfect! No correction needed!

• Onions is the most sweet vegetable in the world, which includes fructose, glucose and sucrose.
• Onions is are the most sweetest vegetables in the world, which and include contain fructose, glucose and sucrose.

• However, since allyl sulfide included in onions is too strong pungent component, you will feel that raw onions are gingery.
• However, since the pungent component allyl sulfide included contained in onions is too strong pungent component, you will feel that raw onions are gingery.

  "included" makes it seem like someone put the allyl sulfide in the onions. But, it occurs naturally, so "contained" is a better word.

• Allyl sulfide is highly volatile, and this will be reason to cry when you cut onions.
• Allyl sulfide is highly volatile, and this will be is the reason to you cry when you cut onions.

• Also, if you heat allyl sulfide, it will become propyl mercaptan, which has a high sugar content.
• This sentence is perfect! No correction needed!

• Although propyl mercaptan has fewer calories, it's said that the sweetness is 50 times as sweet as sugar.
• This sentence is perfect! No correction needed!

• Onions are an excellent ingredient that is delicious and nutritious if you cook it properly.
• Onions are The onion is an excellent ingredient that is delicious and nutritious if you cook it properly.

  Subject-verb agreement--"ingredient" and "it" are singular

• Today, I will talk about onions.
• This sentence is perfect! No correction needed!

• Onions is the most sweet vegetable in the world, which includes fructose, glucose and sucrose.
• Onions contain fructose, glucose and sucrose and are among some of the sweetest vegetables in the world.

  Writing and rephrasing this way is natural and makes for a far more interesting introduction.

• However, since allyl sulfide included in onions is too strong pungent component, you will feel that raw onions are gingery.
• However, the presence of allyl sulfide, a pungent chemical, is responsible for the gingery smell of onions.

  I assume you mean the smell.

• Allyl sulfide is highly volatile, and this will be reason to cry when you cut onions.
• Because of the volatility of Allyl sulfide, cutting onions can result in tearing.

  volatility = noun

• Also, if you heat allyl sulfide, it will become propyl mercaptan, which has a high sugar content.
• This sentence is perfect! No correction needed!

• Although propyl mercaptan has fewer calories, it's said that the sweetness is 50 times as sweet as sugar.
• Although propyl mercaptan has fewer calories, it has 50 times the sweetness of sugar.

  if it's certain and proven, then use 'it has...'

• Onions are an excellent ingredient that is delicious and nutritious if you cook it properly.
• Cooked properly, onions are an excellent ingredient that is not only flavourful but also nutritious.

  A more impactful sentence
  
  Flavorful is the better word. Onions on their own would not exactly count as delicious.

Onions are a core part of vegetarian pizza, if that's your thing. Without onions, the pizza would lose a great deal of taste.