Mince 2 cloves garlic. If using canned beans, drain and rinse the beans. In a sauce pan, heat 1 tablespoon of olive oil over medium heat. Add the garlic and sauté for about 45 seconds until lightly browned. Add 2 cups black beans, 1/4 teaspoon kosher salt, 2 teaspoons hot sauce, and 1 teaspoon chili powder. Heat until the beans are warm, and then cover and keep warm.
In a bowl, whisk together 1/4 cup sour cream, 1/4 teaspoon cumin, 1/4 teaspoon kosher salt, and the zest of 1/2 lime.
Brush 4 tortillas with a bit of olive oil and grill each side for about 3 to 4 minutes, until just blackened.
On each tortilla, place black beans, roasted tomato salsa, cumin sour cream, and crumbles of queso fresco or feta. Garnish with the extra lime zest and a wedge of lime.