A saucy affair

RESTAURANTS • First Person

Red-sauce Italian is generally best left to storied institutions — or your nonna. 

Donna, the namesake matriarch of Echo Park’s new spaghetti spot, isn’t actually a nonna. She isn’t even a real person. She’s a fictional construct of owners Michael Francesconi and Matthew Glaser, who made her up to evoke the idea of a nonna cooki…