Preheat oven to 400 degrees. Wrap tortillas in foil, place in oven, and warm while preparing the filling.
In a medium saucepan, heat oil over medium heat. Add scallions and garlic; cook 1 minute until fragrant. Stir in beans, chipotle, and 1 cup water. Bring to a simmer, season with salt and pepper; cook until slightly thickened and hot, 5 to 7 minutes. Stir in salsa (if desired), corn, and lime juice; cook until heated through.
Unwrap tortillas; spread yogurt over one side. Top with bean mixture, cilantro leaves, lettuce, and cheese. Fold tortillas over. Serve with salsa and chipotle, if desired.
I included one whole chipotle pepper but left out some of the seeds and I got a perfect hint of flavor from it after cooking -- not spicy. I served these beans in blue corn hard shell tacos with a dollop of sour cream, instead of soft tacos with yogurt and it was delicious. The beans needed to sit a little bit after cooking to thicken them up since I included the full 1 cup of salsa.
This was wonderful!! I would taste the adobe before adding it to the beans I did and it was too spicy so I left them out. I also added the cilantro some lime juice and salt and pepper to the yogurt and everyone loved it. There is a mild green salsa from la costena and it is perfect.