1. **Marinate the Carne Asada:**
– In a bowl, combine olive oil, minced garlic, lime juice, cumin, chili powder, paprika, salt, and pepper.
– Rub the mixture all over the steak and let it marinate for at least 30 minutes (or up to 2 hours for more flavor).
2. **Cook the Steak:**
– Heat a grill pan or skillet over medium-high heat. Cook the steak for 4-5 minutes per side, or until desired doneness is achieved.
– Let the steak rest for 5 minutes, then slice it thinly against the grain.
3. **Assemble the Tostadas:**
– Spread a layer of guacamole on each tostada shell.
– Top with slices of carne asada.
– Add pico de gallo or any additional toppings you like.
4. **Serve:**
– Garnish with fresh lime wedges and cilantro. Serve immediately and enjoy!
Prep time: 20 minutes, Cooking time: 10 minutes, Servings: 4-6, Calories: ~350 kcal per serving.