2cupsmixed mushrooms (cremini, shiitake, and button), sliced
1wholebell pepper, sliced (red or yellow for sweetness)
1mediumred onion, sliced
4clovesgarlic, minced
1quarter cupbalsamic vinegar
2tablespoonsolive oil
1teaspoondried thyme
to tastesalt and pepper
2cupscooked quinoa or rice (for serving)
to tastefresh parsley, chopped (for garnish)
Instructions
In a bowl, whisk together balsamic vinegar, 1 tablespoon olive oil, thyme, salt, and pepper. Add the flank steak and marinate for at least 30 minutes, preferably up to 2 hours for deeper flavor.
Preheat a grill pan or skillet over medium-high heat. Remove the steak from the marinade and sear for about 4-5 minutes on each side for medium-rare, or until your desired doneness is reached. Let it rest for 5-10 minutes before slicing against the grain.
In the same skillet, add the remaining tablespoon of olive oil. Add the sliced red onion, bell pepper, and mushrooms. Sauté for 5-7 minutes, or until the vegetables are tender and slightly caramelized. Stir in minced garlic and cook for an additional 1-2 minutes until fragrant.
In serving bowls, layer the cooked quinoa or rice as a base. Top each bowl with a generous portion of sautéed vegetables, followed by sliced steak.
Sprinkle with fresh parsley for a pop of color and added freshness. Drizzle with any remaining balsamic glaze for extra flavor.
Notes
Marinating the steak for longer enhances the flavor.