Roasted Asparagus & Lemon-Dill Mushrooms with Herb Butter

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Tender asparagus and earthy mushrooms roasted with garlic and dill, finished with a zesty lemon-herb butter that elevates this simple side dish. This mediterranean-inspired sheet pan (keto vegetable) ready in about 30 minutes pairs (trimmed) asparagus, (halved) cremini mushrooms, butter for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 180 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. 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.

Prep: 10 min Cook: 20 min Serves 4 Mediterranean cuisine 180 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 400°F. Toss 12 oz trimmed asparagus and 8 oz halved mushrooms with 1 tbsp olive oil, 1/4 tsp sea salt, and 1/8 tsp black pepper on a parchment-lined baking sheet.
  2. Step 2: Roast for 15 minutes, then flip vegetables and cook for 5 more minutes until asparagus is tender-crisp and mushrooms are golden.
  3. Step 3: While vegetables roast, melt 2 tbsp butter in a small saucepan over medium-low heat. Add 2 minced garlic cloves and cook for 1 minute until fragrant.
  4. Step 4: Remove pan from heat and stir in 1 tbsp chopped fresh dill and 1 tsp lemon zest. Pour over roasted vegetables immediately and toss gently to coat.
  5. Step 5: Serve hot, ensuring the herb butter is evenly distributed across all vegetables.

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Frequently asked questions

How long does Roasted Asparagus & Lemon-Dill Mushrooms with Herb Butter take to make?

Total time is about 30 minutes (10 min prep + 20 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Roasted Asparagus & Lemon-Dill Mushrooms with Herb Butter?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep (trimmed) asparagus from drying out.

Can I substitute ingredients in Roasted Asparagus & Lemon-Dill Mushrooms with Herb Butter?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Roasted Asparagus & Lemon-Dill Mushrooms with Herb Butter for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

Is Roasted Asparagus & Lemon-Dill Mushrooms with Herb Butter keto vegetable?

Yes — this recipe is tagged keto vegetable based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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