Prep Time 20 minutes mins
Cook Time 15 minutes mins
Resting Time 10 minutes mins
Total Time 45 minutes mins
For even cooking, let the steak come to room temperature for 30 minutes before grilling and use an instant-read thermometer to avoid overcooking. If your brussels sprouts are large, quarter them so they char without burning; placing them cut-side down maximizes caramelization. Swap almonds for pine nuts or walnuts in the pesto, and thin the pesto with extra lemon juice for brightness. Leftover pesto keeps 3 to 4 days refrigerated under a thin layer of oil. If you don’t have a grill, sear the steak in a very hot cast-iron skillet with a little oil and finish in a 400°F oven as needed. Adjust seasoning at the end with flaky salt and a splash of vinegar to balance the richness.