The mantra inscribed in this artwork is:
एकदंताय वक्रतुण्डाय गौरीतनयाय धीमहि ।
गजेशानाय भालचन्द्राय श्रीगणेशाय धीमहि ॥
It translates to:
Ekdantay Vakratunday Gauritanayay Dheemhee
Gajeshanay Bhalchandra Shriganeshay Dheemahi
The shloka praises Lord Ganesha (Ganesh Stuti), describing the glory of Ganesha.