I am not sure how this would work never having tasted sweet potato gnocchi. but here is a link to a Rachel Ray Recipe for Vegetable Not-sagna Pasta Toss.
Not sure if it will help but it did sound interesting .
Grandma Pam to 3
“Other creatures receive food simply as fodder. But we take the raw materials of the earth and work with them—touch them, manipulate them, taste them, glory in their heady smells and colors, and then, through a bit of alchemy, transform them into delicious creations.”
― Judith Jones, The Tenth Muse: My Life in Food