First of all, you will have to cut the steak. Slice the steak in the form of thin strips before you put it for marination.
Make the marinade by whisking together ⅓ cup of olive oil, sugar, cumin, vinegar, soy sauce, and minced garlic. You can whisk this all together in a large bowl.
Now you will have to place the steak in the marinade to coat it thoroughly. Then, cover it in plastic wrap and marinate it for 30-60 minutes.
The next step is to make carne asada. For this, you will have to heat oil in a skillet on medium-high heat. Once the oil has warmed up, remove the steak from the marinade and add it to the skillet. Stir-fry it for 5 minutes.
Assemble all the Mulitas. Now, brush the tortilla with oil on both sides. Place one tortilla in the large skillet and sprinkle cheese onto it. Add a layer of carne asada and sliced onions on top of it. Add cheese and then place a tortilla above it.
Cook the tortilla bottom until it turns golden brown. Then turn it upside down and cook the other side for 1-2 minutes until it turns golden brown too. Now, remove it from the skillet.
Peel the top tortilla and add mashed avocado, cilantro, and diced tomatoes.
Repeat the same process with the remaining cheese, tortilla, and filling.
It’s ready, now serve it with your favorite toppings!