Pan-Seared Beef Sirloin with Roasted Brussels Sprouts and Carrots
Tender sirloin steak pan-seared to medium-rare paired with caramelized roasted Brussels sprouts and carrots for a hearty Whole30 dinner. This American-inspired beef recipe (whole30, gluten free), ready in about 40 minutes, pairs beef sirloin steak, olive oil, sea salt for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 calories and feeds 2, so it slots cleanly into a Whole30 week and pairs well with roasted sweet potato or a simple olive-oil salad. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1 lb (2 steaks, about 1/2 inch thick) beef sirloin steak
- 3 tbsp, divided olive oil
- 1 tsp, divided sea salt
- 1/2 tsp, divided black pepper
- 3 cups (about 300g) Brussels sprouts, halved
- 3 medium carrots, peeled and cut into 2-inch sticks
- 1/2 tsp garlic powder
- 4 fresh thyme sprigs
The sheet pan we’d roast this on → Best Sheet Pans in 2026: Top Picks + Buying Guide
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Equipment for this recipe
Tools this recipe's steps call for, with a link to each on Amazon.
Instructions
- Step 1: Preheat oven to 425°F. Toss 3 cups halved Brussels sprouts and 3 medium peeled carrot sticks with 2 tbsp olive oil, 1/2 tsp sea salt, 1/4 tsp black pepper, and 1/2 tsp garlic powder on a rimmed baking sheet. Spread evenly and roast for 25 minutes, shaking halfway through until vegetables are browned and tender.
- Step 2: While vegetables roast, pat dry 1 lb beef sirloin steaks with paper towels. Season both sides with 1/2 tsp sea salt and 1/4 tsp black pepper.
- Step 3: Heat 1 tbsp olive oil in a large cast iron skillet over medium-high heat until shimmering. Add steaks and sear for 3-4 minutes per side for medium-rare doneness, or cook longer to desired doneness.
- Step 4: Remove steaks from skillet and let rest for 5 minutes to retain juices.
- Step 5: Plate steaks alongside the roasted Brussels sprouts and carrots, garnish with 4 fresh thyme sprigs for aroma and presentation.








