In a bowl, combine the minced garlic, ground cumin, smoked paprika, chili powder, olive oil, lime juice, salt, and black pepper to make the marinade.
Place the thinly sliced steak in a resealable plastic bag or a shallow dish. Pour the marinade over the steak, making sure it's evenly coated. Seal the bag or cover the dish and refrigerate for at least 30 minutes to marinate. You can also marinate it for longer, up to 4 hours, for more flavor.
While the steak is marinating, heat 1 tablespoon of olive oil in a large skillet over medium heat. Add the sliced onions and bell peppers. Sauté them until they are tender and slightly caramelized, about 10-15 minutes. Set aside.
In the same skillet, cook the marinated steak slices over medium-high heat for 2-3 minutes per side, or until they reach your desired level of doneness. Be careful not to overcook as the steak can become tough.
Warm the whole-grain or low-carb tortillas in the oven or on a dry skillet for a few seconds per side.
To serve, spoon the cooked steak and sautéed peppers and onions onto each tortilla. Add optional toppings like sliced avocado, salsa, and low-fat Greek yogurt if desired.
Roll up the tortillas, and your marinated steak and pepper fajitas are ready to enjoy.Remember to monitor portion sizes and choose whole-grain or low-carb tortillas to help manage blood sugar levels. Additionally, it's essential to consult with a healthcare professional or registered dietitian to tailor this recipe to your specific dietary needs and to ensure it aligns with your diabetes management plan.