We are going to have pizza for dinner
We are going to eat sushi for dinner
You are going to drink coke for dinner
Today I will have meat "for dinner" ( hoje eu terei carne para o jantar)
I need to buy tomatos for dinner ( tenho que comprar tomates para o jantar)
I Love to go out and eat japanese food for dinner ( eu adoro sair e comer comida japonesa no jantar)

good luck