This recipe offers a delicious vegetarian alternative to traditional burgers, featuring savory grilled portobello mushrooms. It's complemented by a creamy avocado and shallot mash, fresh tomato slices, and served on soft rolls, creating a satisfying and flavorful meal.
For the portobello mushrooms, ensure they are cleaned thoroughly, but avoid washing them under running water as they can absorb too much moisture; a damp cloth is best. Grilling them cap-side down first helps to create a nice sear and allows any excess moisture to release. Don't overcook them, or they will become rubbery. For the avocado mash, using a ripe but firm avocado is key for texture. A pinch of cumin or a touch of finely chopped cilantro can elevate the flavor profile. Consider lightly toasting the rolls for a better structural integrity and texture contrast against the soft mushroom and creamy avocado.