Could you please correct my short writing?

The other day I wasn't being able to decide what to make for dinner and as most of us know , choosing menu a dish can be nagging annoying unless you have someone to cook for you. I thought of having gotten getting mackerels on during my last grocery excursion but I realized I had some that were sitting in my refrigerator. They were imported from England. What a globe-trotting fish with wonderful taste! I wondered its taste. So I began the process by cutting them into pieces and then placing them above big chunks of radish. Next I  and added a cup of water with a condimental mixture of soy sauce, red pepper powder, garlic, ginger, and corn syrup. Oh I almost forgot, I also added, sliced onions and leeks laid on top. Then after twenty minutes I tasted an out-of-this-world dish of English mackerel and juicy radish my final result and it was out-of-this-world ! I think I will cook this yummy mackerel and radish dish again soon.

Could you please correct my short writing?

The other day I couldn't decide what to make for dinner. Choosing what to eat can be quite bothersome (<em>nagging</em> is a little bit too harsh to use in this context), unless you have someone to cook for you. I remembered the mackerels that I had gotten on my last shopping trip that were still sitting in my refrigerator. They were from England. What a globe-trotting fish! I wondered what they would taste like. I cut them into pieces and put them in a pot/dish with big chunks of radish, and added a cup of water and a with condimental mixture of soy sauce, red pepper powder, garlic, ginger, and corn syrup. Oh, I also put sliced onions and leeks laid on top. After it had been in the oven for twenty minutes, I tasted an out-of-this-world my delicious dish of English mackerel and juicy radish that was out of this world! I think I will cook it again soon.