This is the 17477th most frequent Russian word.
томатами
"Томатами" means "tomatoes" in English (instrumental plural form).
The word 'томатами' refers here to the plural form of 'tomato', being used in its instrumental case to indicate association or relation with another object.
На рынке продавали огурцы и томаты.
At the market, they were selling cucumbers and tomatoes.
The word 'томатами' conveys the instrumental case showing the means or method by which something is achieved or performed, in this case decorating the salad.
Салат был украшен свежими томатами.
The salad was garnished with fresh tomatoes.
Here, 'томатами' indicates the involvement or presence of tomatoes as a key ingredient in the recipes, utilizing the instrumental case for relatedness.