In a city glutted with food trucks, it can be hard to carve out a niche. That's why "Mama" Cass Thatcher is staking her claim for sliders with Vietnamese flair. Using a targeted menu of three sliders, including sweet and savory pork meatballs and shaking steak with caramelized onions, Thatcher says she is combining her knowledge of Vietnamese cuisine with her husband's penchant for easy-to-grab handheld fare.

Mama Cass is a new slate grey Vietnamese slider truck posting up in Mission Bay that'll serve tiny bun'd comestibles like a pork meatball mini-burg with baby spinach...