Tomato, Avocado, and Sweet Onion Quesadilla
A long time ago, before any of us had kids, Paul and I went to Mexico City for twelve hours with our friend, Levi. He worked for an airline at the time and did extragavagantly spontaneous things like take his friends to Mexico City for twelve hours.
We arrived just before dawn and wandered along the cobblestone streets of the old quarter, stumbling upon churches and coffee and murals and narrow arcades and grand piazzas. As the day got hot, we stopped in the blue-tarp shade of a quesadilla vendor at an open air market. She was patting out masa next to a big burnished hot iron grill surrounded by dozens of quesadilla fillings. I remember squash blossoms and mushrooms and rajas and potatoes and some sort of greens, but there were more. We pulled up stools and worked our way through every possible vegetable combination.