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1. Finally / eventually i went to England in this summer.

2. I cooked dinner last night.

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No, the last one is "Lastly, I cooked dinner." 

"En son akşam yemek pişirdim" or "en son akşam akşam yemeği pişirdim", would give "i cooked (dinner) the last night".

mltm is right.

It might be "Lastly, i cooked dinner". Sorry for my fault and thanks for correction.

Well, guys please don´t take it as a correction but my way of translating it:

2. It was a dinner´s meal when I cooked last time.

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you are right in your thinking but I think what I said is more or less the same thing because the question is "what did you cook the last time you cooked", "Lastly I cooked dinner"

-en son ne pişirdin?

-en son akşam yemeği pişirdim.

so we can say

- (en) sonunda = at last

- "en son" or "son olarak" = lastly

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Before posting I googled for it and found examples with saxon genitive as well just like I posted so I didn´t changed it. Is  English your first lingo?

Note: don´t worry I think I can smell if it is personal or not.

"Lastly I cooked  dinner" makes me think maybe "you cooked lunch (or whatever) before than that".

I think without a context my interpretation is more likely.

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Yes, you say it for something done that has been longing for.

You can say just "sonunda" in the place of "en sonunda".

(En) sonunda geldin. At last you arrived.

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google "dinner´s meal" where you can´t find it. Now are you saying "a dinner´s meal" would be incorrect while the following can be OK for example?

That is when after a days work they will still request that I cook the dinner´s meal.

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www.synonym.com

If you type "eventually" in there you will see "finally". 

I dont know what happened to New British Users in here, cause whatever we say, they dont understand us. Old users always understand us easily....

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Me speaks "pigeon English".

Let me rephrase it:

The last meal I cooked was dinner. or

The last time I cooked, I cooked dinner.

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 HarpOOn: I understand you easily.

So I hope you are using "old" to mean "been on the site a long time" rather than "geriatric and needing my pension soon"!!

I understand harpoon easily too. He is my buddy. Now we even communicate telepathicaly

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I said "my way of translating it". You have a problem with my way?

What is your point? Are you trying to show how poor my English is?

Of interest is this from today´s advice column "Ask Amy":

"I´ve been invited to multiple friends´ weddings this summer. Currently, I am receiving requests for reception dinner preferences with the choice of meat, fish, or a vegetarian option consisting of pasta.

"I am a gluten-free vegetarian. Most of my friends are aware of my aversion to meat. However, not all of them know that I am gluten-free due to health reasons.

"Knowing that the couples are under a lot of stress, I would like to avoid inconveniencing them with my dietary restrictions.

"I do not want to offend anyone by attending the dinner but declining the meal. How do I share in the nuptial celebrations without troubling anyone?"

We see that, for this enquirer, the dinner is the event, of which the meal is the component at which food is served.

Thank you buddy

Exactly i meant "been on the site a long time "

"en sonunda" can loosely be translated as " after having exhausted all other possibilities"