What should I eat at the all inclusive hotel to make sure I do not gain weight during my trip?

During my last Mexican all inclusive trip, I had 7 cups of salad every day and made sure to include both greens and tomatoes in each salad. I also had fruit and salad soups and fruit and salad appetizers and 80% or more of the drinks I had were non alcoholic Caesar’s which is usually tomato juice mixed with spices. I gained 10 pounds but lost all 10 in 3 days cause my diet was so nutritious while I was there.

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So my Mexican trip is in December, I am trying to lose weight before we go.
What should I eat at the all inclusive hotel to make sure I do not gain weight during my trip?
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