Yesterday, I ate gratin priced at 1400 yen (12.8 dollars) while using a shareholder's invitation ticket to cover the equivalent of 1000 yen.

So I virtually just payed the rest of the 400 yen in cash.

Or, you can say: "So I virtually just payed 400 yen in cash."

However, despite being an expensive dish in (consideration ofing the price of other same goodimilar dishes in other restaurants), ithe tasted was disappointing.

First of all, it was watery like stew, while I wanted to eat a more condensed and sticky one, and at least about itswith the surface with being burnt lightly browned.

Sometimes "burnt" can have negative connotations. You could say "grilled" (if it was made in an oven), or "browned" to describe a light brown colour from being baked.

Avocados on the top of the dish was also a malicious inthing to include in a savoury dish.

I've corrected it to what I think you meant.

Overall, I will never ever ever ever (This is the U.S. incumbent President Biden's habitual words, though lol) order that again as a conclusion.

Rather, I had no choice but to do so, so I didn't regret it at all because I had already eaten many kother thindgs ofrom the menu in theat restaurant throughout the past years while using the tickets, so I wanted to try a new one that I had lessn't wanted to choose so much but had a slight curiosity to try.

So, it's totally O.K. If the pandemic finishes, I can go to an adjacent metropolis where I am supposed to be able to have more choices by using the same ticket of the company ticket.

EspeciallyIn particular, I can go to a conceptual restaurant where the interior is gorgeous and fantastical, and that has maid-like woaitresses who serve us provide entertainment. (Although, of course, I am more attractive than them lol So h). Honestly, I don't want to pay any high-price surcharge like assuch as an entrance fee or seat usage charge or whatever is called lol) entertain us and offer the services.

Your original sentence was a bit difficult to read! Try putting similar ideas closer together.

Gratin is one of the most popular, common, and long-lasting foods in Japan.

Even as a frozen food as well aslike Chinese dumplings, pasta and takoyaki, it is so common here.

But among my experiences talking to non-Japanese people online, strangely, it turns out that they mostly don't know eveneven know about the existence of the food, although they know about and give good feedbacks to for sushi, ramen, and curry and rice in Japan.

I don't exactly know in which countries they eat or know about itgratin.

And Japanese people certainly don't realize about that fact so that they would be surprised to hear it.

I like Ggratin and Ddoria (a sister-like food to Ggratin like Ggratin plus rice) whether it is cooked by a microwave or in a family restaurant.

Decide whether you want to capitalise food names or not - then give all of them (or none of them) a capital letter.

And whenever a restaurant offers both Gratin and Doria, I order Doria with high chanceam likely to order Doria because as I mentioned it before, Doria is similar to the Gratin and includes rice which can fulfill both of my satisfaction and appetite.

Again, decide about the capitals.