To describe a big meal in Engpsh, you could say:

"I had a big feast for dinner."
"We enjoyed a lavish banquet for lunch."
"It was a hearty meal with all the trimmings."

Here are some other phrases you might use to describe a big meal:

"We ate until we were stuffed."
"It was a spread fit for a king."
"We indulged in a sumptuous feast."
"It was a feast for the senses."
"We had a veritable feast on the table."

I hope that helps! Let me know if you have any other questions.