This Chimichurri Steak Recipe is naturally gluten-free when prepared with pure steak, fresh herbs, olive oil, vinegar, garlic, and spices. To ensure it remains gluten-free, verify that the red wine vinegar, dried oregano, red pepper flakes, and all packaged seasonings are certified gluten-free or free from gluten-containing additives. Use a clean cutting board, skillet, utensils, and serving platter to prevent cross-contamination. If serving with sides, choose gluten-free options such as roasted potatoes, rice, salad, grilled vegetables, or certified gluten-free bread.