Italian Sausage and Fennel Sheet Pan Dinner

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

A rustic sheet pan meal featuring Italian sausage, sweet fennel, and bell peppers roasted to caramelized perfection with aromatic herbs. This italian-inspired sheet pan ready in about 45 minutes pairs medium yellow onion, sliced, garlic cloves, minced, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 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: 15 min Cook: 30 min Serves 4 Italian cuisine 450 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 425°F (220°C). Line a large rimmed baking sheet with parchment paper.
  2. Step 2: In a large bowl, combine 1 lb sliced Italian sausage, 2 cups thinly sliced fennel bulb, 1 large sliced red bell pepper, 1 medium sliced yellow onion, and 4 minced garlic cloves.
  3. Step 3: Drizzle 3 tbsp olive oil over the mixture, then sprinkle 1 tsp dried rosemary, 1 tsp dried thyme, 1 tsp kosher salt, 1/2 tsp black pepper, and 1/4 tsp red pepper flakes (if using). Toss well to coat everything evenly.
  4. Step 4: Spread the sausage and vegetable mixture in a single layer on the prepared baking sheet.
  5. Step 5: Roast in the preheated oven for 25-30 minutes, turning halfway through, until the sausage is browned and cooked through and the vegetables are tender and caramelized around the edges.
  6. Step 6: Remove from oven and serve warm, optionally with crusty bread or polenta.

Equipment for this recipe

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Frequently asked questions

How long does Italian Sausage and Fennel Sheet Pan Dinner take to make?

Total time is about 45 minutes (15 min prep + 30 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 Italian Sausage and Fennel Sheet Pan Dinner?

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 medium yellow onion, sliced from drying out.

Can I substitute ingredients in Italian Sausage and Fennel Sheet Pan Dinner?

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 Italian Sausage and Fennel Sheet Pan Dinner 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.

What goes well with Italian Sausage and Fennel Sheet Pan Dinner?

Italian sheet pan like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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