Street Taco with Mango Salsa
1 (15 ounce) can black beans, rinsed and drai… 1 (15.25 ounce) can corn 1 cup freekeh 1 pinch oregano 1 pinch salt 1 tablespoon diced serrano chile pepper 1 tablespoon olive oil 1 tablespoon white sugar 1 teaspoon ground cumin 1 teaspoon white sugar 10 (6 inch) corn tortillas, warmed 10 tablespoons crumbled feta cheese, or to ta… 10 tablespoons plain yogurt, or to taste 2 tablespoons olive oil 2 tomatoes, chopped 2 ½ cups water 4 cloves garlic, minced salt to taste ¼ cup chopped fresh basil, or to taste ¼ cup chopped fresh cilantro, or to taste ¼ lemon, juiced ¼ lime, juiced ¼ mango, chopped, or more to taste ¼ teaspoon ground coriander ¼ teaspoon ground paprika ½ (12 ounce) package tofu, sliced ½ (8 ounce) package sliced fresh mushrooms ½ green bell pepper, diced ½ onion, chopped ½ teaspoon chili powder ¾ lemon, juiced ¾ lime, juiced