Open the can of beans and put them in a skillet and turn on stove at low heat. Add 1/2 chopped Onion and 2 Tablespoon Salsa.
Heat the mixture at low heat till it starts bubbling. Turn off heat.
Put Salas in serving bowl, Cut the Avocados in cubes-sprinkle with lime juice from one piece.
Prepare the Tacos: On the flat tortilla, spread beans-prepared-, add lettuce, Carrots, Onions-chopped, Cheese and top it with Salsa and Avocado pieces.