Brush or drizzle both sides of the portobello mushrooms with a ... and cook until cheese is suitably melted. While mushrooms are cooking, brush burger buns with plain mayo before toasting on ...

This Soulard Coffee Garden Café grilled sandwich may not technically rank as a cheeseburger, but it unquestionably possesses burger chi: hefty, juicy slabs of portobello mushroom, flavor-packed ...

according to the Texas-based burger chain. It’s made with two beef patties topped with Swiss cheese, au jus sauce and “a generous layer” of grilled mushrooms, all served on a toasted bun ...