Delicious lunch!

I had just finished eating lunch; some potatoes, Chinese cabbages, and white radishes. They're all common vegetables, but taste good. I put some hot peppers in them; I like them very much.

Delicious lunch!

I just finished eating lunch. I had some potatoes, Chinese cabbage, and daikon radish. They're all common vegetables, but they taste good. Because I like them very much, I added some hot peppers.

Hi Oye, finished is already past tense. When you add "had" it sounds like you're going to say something like: "I had just finished eating lunch when the telephone rang."

Also, "white radish"  - you're talking about the regular, long, white, lubuo, right? This is called daikon radish in the US.

I hope this is helpful, I also made sentence changes to make your notebook entry sound natural.