Mala (Sanskrit) is the name of the beads, and the process of repeating the mantra (beads optional) is called Japa (Sanskrit), thus the term, Japamala.
It is a very good habit, to ensure that you chew your food properly, (you should never swallow anything that's not liquid) is to perform Japa, while you chew your food.
A suitable mantra, that also expresses gratitude, would be ideal.
Peace.