Grilled Focaccia Flatbread with Feta, Olives, and Caramelized Onions

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

Warm, charred focaccia topped with tangy feta, briny olives, and sweet caramelized onions, perfect for a picnic or appetizer. This mediterranean-inspired grilling (vegetarian) ready in about 35 minutes pairs extra virgin olive oil, large, thinly sliced yellow onion, crumbled feta cheese for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 280 calories and feeds 6, 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: 25 min Serves 6 Mediterranean cuisine 280 cal/serving
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Ingredients

Instructions

  1. Step 1: Heat 2 tbsp extra virgin olive oil in a large skillet over medium-low heat. Add 1 large thinly sliced yellow onion and cook, stirring occasionally, for 20 minutes until deep golden and caramelized.
  2. Step 2: Preheat grill to medium-high heat (about 400°F). Brush both sides of 1 large focaccia bread with remaining 1 tbsp olive oil.
  3. Step 3: Place focaccia on the grill and cook for 3-4 minutes per side until grill marks appear and the bread is warmed through.
  4. Step 4: Remove focaccia to a cutting board, spread the caramelized onions evenly over the top, then sprinkle 1 cup crumbled feta cheese and 1/2 cup halved Kalamata olives.
  5. Step 5: Scatter 1 tbsp chopped fresh rosemary over the toppings, season with 1/2 tsp sea salt and 1/4 tsp black pepper.
  6. Step 6: Cut into squares and serve warm or at room temperature.

Equipment for this recipe

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Frequently asked questions

How long does Grilled Focaccia Flatbread with Feta, Olives, and Caramelized Onions take to make?

Total time is about 35 minutes (10 min prep + 25 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 Grilled Focaccia Flatbread with Feta, Olives, and Caramelized Onions?

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 extra virgin olive oil from drying out.

Can I substitute ingredients in Grilled Focaccia Flatbread with Feta, Olives, and Caramelized Onions?

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 Grilled Focaccia Flatbread with Feta, Olives, and Caramelized Onions for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). 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 Grilled Focaccia Flatbread with Feta, Olives, and Caramelized Onions vegetarian?

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

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