Grill-Pan Portobello Steaks with Melted Feta & Ikarian Green Herb Pesto

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Big flavors don’t require meat.These deeply charred grill-pan portobello steaks take one of Greece’s most important flavor foundations—ladolemono (olive oil and lemon)—and apply it to vegetables in a way that feels indulgent and satisfying. Large portobello caps soak up garlic, oregano, olive oil, and lemon before hitting a smoking grill pan and getting pressed hard for deep caramelization and maximum umami. Finished with softened feta and served over a vivid Ikarian-inspired herb pesto, this dish channels the spirit of one of Greece’s Blue Zones, where herbs, olive oil, vegetables, and moderation are everyday practice.No outdoor grill required.Perfect for entertaining, weeknight dinners, or anyone trying to eat more vegetables without sacrificing flavor. The result is rich, savory, herbaceous, and unmistakably Mediterranean.

Course main course

Cuisine Greek, Mediterranean diet, vegetarian

Keyword feta recipes, Greek mushroom recipes, healthy Greek cooking, Ikarian recipes, longevity recipes, Mediterranean diet meals, mushroom dinner ideas, portobello steaks, vegetarian Greek recipes

SERVES 4

Ingredients

Portobello Marinade

4 large portobello mushroom caps stems removed
5 Tbsp Greek extra virgin olive oil
Juice of ½ lemon
2 garlic cloves grated
1 tsp dried Greek oregano
1 tsp sea salt
½ tsp black pepper

Ikarian Green Herb Pesto (Dairy-Free)

30 g flat-leaf parsley
20 g fresh mint reserve some
15 g oregano leaves
40 g walnuts toasted
25 g hazelnuts toasted and skins removed
1 garlic clove
1 Tbsp lemon juice
80 ml Greek extra virgin olive oil
Sea salt and black pepper

Warm Feta Finish

150 g Greek feta cut into 4 slabs
Zest of ½ lemon
Fresh mint torn
Fresh cracked pepper
Extra virgin Greek olive oil

Instructions

Marinate the Mushrooms

Whisk together olive oil, lemon juice, garlic, oregano, salt, and pepper.
Arrange mushrooms gill-side up and spoon half the marinade into the gills.
Flip and brush the tops.
Rest 20–30 minutes only.

Make the Herb Pesto

Add parsley, mint, oregano, walnuts, hazelnuts, garlic, and lemon juice to a food processor.
Pulse until coarse.
Slowly drizzle in olive oil until the pesto just comes together.
Season.

Grill the Portobellos

Heat a cast-iron grill pan until smoking.
Remove mushrooms from marinade.
Place gill-side down first.
Press firmly for 30 seconds.
Cook 4–5 minutes untouched.
Flip.
Cook another 3–4 minutes.
Melt the Feta
Place one feta slab over each mushroom.
Cover loosely.
Steam 90 seconds–2 minutes until soft and creamy.
Finish & Serve
Spread pesto generously across each plate.
Top with mushroom.
Finish with:
Lemon zest
Torn mint
Black pepper
Drizzle of EVOO
Serve immediately.