Vegetarian Black Bean Tostadas

In an earlier post, I had briefly mentioned about our picnic at the park which we did couple of months ago. Few of our family friends got together and we had a potluck in a small water park. We decided to go with Mexican cuisine and we cooked dishes to go with the theme. I had prepared corn salsa along with Mexican Rice and Guacamole. The other friends had brought nachos, salads, Tostadas, chips etc.  The kiddo is not too fond of Mexican food and is usually reluctant to try out new dishes. After much cajoling he might take a…