Prep & Marinate the Beef
In a medium mixing bowl, whisk together the extra virgin olive oil, lemon juice, oregano, smoked paprika, and garlic powder. Add the thinly sliced flank steak and toss until every piece is well-coated. Let it sit at room temperature for at least 15 minutes to soak up the flavors.
Sauté the Fajita Vegetables
Heat 1 tablespoon of olive oil in a large cast-iron skillet over medium-high heat. Add the sliced bell peppers and red onions. Cook for 5–7 minutes, stirring occasionally, until the vegetables are tender-crisp and have developed those signature charred "fajita" edges. Remove the vegetables from the skillet and set them aside on a plate.
Sear the Beef
Wipe out the skillet if necessary and return it to high heat. Add the marinated beef in a single layer (work in batches if your pan is small). Sear for 2–3 minutes per side without moving them too much; this creates a deep, savory crust. Once browned and caramelized, remove from heat.
Assemble the Mediterranean Bowls
Grab four deep serving bowls and start with a base of 1/2 cup cooked rice in each. Divide the seared beef and the sautéed vegetables equally among the bowls, placing them side-by-side over the rice.
Garnish & Serve
Finish each bowl by adding the fresh components: a handful of halved cherry tomatoes, a few slices of cucumber, and a generous dollop of tzatziki sauce.