Butter Herb Steak with Roasted Mixed Vegetables

By AislePrompt Editorial · Published 2026-05-15 · Updated 2026-05-15

Seared butter herb steak paired with a colorful medley of roasted vegetables for a satisfying Whole30 meal. This American-inspired Whole30 recipe, ready in about 40 minutes, pairs sirloin steak, butter (ghee or clarified for Whole30), fresh thyme for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 4, 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, about 1-inch thick sirloin steak
• 2 tbsp butter (ghee or clarified for Whole30)
• 1 tbsp chopped fresh thyme
• 1 tbsp chopped fresh rosemary
• 3 minced garlic cloves
• 2 medium, cut into 1/2-inch sticks carrots
• 1 bunch (about 12 spears), trimmed asparagus
• 1 cup cherry tomatoes
• 3 tbsp olive oil
• 1 1/2 tsp divided salt
• 1 tsp divided black pepper

The cast-iron skillet we’d sear this in → Best Cast Iron Skillets for 2026: Top Picks + Buying Guide

Instructions

1. Step 1: Preheat oven to 425°F. Toss 2 peeled and cut carrots, 1 bunch trimmed asparagus, and 1 cup cherry tomatoes with 3 tbsp olive oil, 1 tsp salt, and 1/2 tsp black pepper on a large sheet pan. Spread evenly and roast for 20 minutes until tender and slightly caramelized.
2. Step 2: While vegetables roast, pat dry 1 lb sirloin steak and season both sides with 1/2 tsp salt and 1/2 tsp black pepper.
3. Step 3: Heat a large skillet over medium-high heat and melt 2 tbsp ghee (clarified butter). Add 3 minced garlic cloves, 1 tbsp chopped fresh thyme, and 1 tbsp chopped fresh rosemary, sautéing for 30 seconds until fragrant.
4. Step 4: Add the steak to the skillet and sear for 4-5 minutes per side for medium-rare, spooning the herb butter over the steak as it cooks.
5. Step 5: Remove steak and let rest for 5 minutes. Serve sliced steak alongside the roasted vegetables.