grilled vegetable tostadas with black beans

these tostadas are really flavorful. the vegetables have excellent texture and have a bit of grill "char" that adds a lovely smokiness. the addition of the black beans simmered in salsa with a little bit of cumin is what makes this dish excellent. without it - i believe it would have been a bit blah. the avocado added a wonderful creamy texture to the crunchy vegetables. everything "played together" so well! i thought it sounded a little weird to add feta to this - but that tart bite on top was perfection.