Preheat oven to 425 degrees.

In a small saucepan, heat the olive oil over medium-high heat. When hot, add garlic and brown until fragrant, approximately 30 seconds to 1 minute. Add the drained black beans and jalapeño. Heat the beans for 2 to 3 minutes until hot. Remove from heat and using a fork or potato mash, mash the beans together until smooth, adding a Tbsp of water or two if needed.

Spread the toasted slices of bread with the bean mixture, evenly dividing it between the slices (you will have leftovers!). Top the sandwiches with pork and bake until the pork is heated all the way through, approximately 7 to 10 minutes. Add the crumbled queso fresco and bake for another 4 to 5 minutes until the cheese is melted. Remove from the oven and top with guacamole or mashed avocado, cilantro and salsa/hot sauce as desired. Serve immediately.