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O nosso jantar esta noite

Acho que vou a cozinhar peixe esta noite. Talvez tilápia com pesto frita levemente na manteiga e sobre a massa aletria com alho e queijo parmesão.

The mistakes are in red and suggestions on how to improve the sentences are in blue, based on how we speak in Portugal.
() = Option or information

Nosso jantar desta noite:

Hello, Tim! How are you?

Let me try to help you, and forgive my English, I'm intermediate...

》Nosso jantar esta noite (1)

》Note 1: in this case, "esta", "desta" and "nesta" are accepted by the quotidian brazilian portuguese. For example, a famous composer and singer from the state of Minas Gerais called Lo Borges wrote "por favor, não se apague esta noite".

》Note 2: the quotidian brazilian portuguese accepts the auxiliar verb "ir" with an infinitive verb to mean a closer future action, but be careful. This verb give us an idea of movement, originally ("Eu irei [irei is a flexion of ir that means a future motion] para a casa da minha mãe" = "I'll go to my mother's home"), so, even it is not the usual, the best way to write is "cozinharei" (oooook, you can use it in just formal situations today, 'cause "ir" was very popularized). ='|

》Note 3: there is a problem with the phrasal construction. The better way to fix it was written by Bruno Lepore: he put a comma before "frita", making an appositive. As you didn't use it, maybe the reader can understand that you will fry the fish above the pasta.

I hope I helped you.

Nosso jantar desta noite

Nosso jantar esta noite