Grilled Eggplant & Portobello Sandwich with Fresh Mozzarella and Romesco

Method

1. Salt the eggplant. Arrange slices on a cutting board. Sprinkle both sides with salt. Let sit for 20 minutes. Pat dry with paper towels. Brush both sides with olive oil.

   Salt early and throughout the cooking process. Salt added at the beginning penetrates the food; salt added at the end sits on the surface. Both are important, but the foundation matters most.

2. Make the garlic spread. Mix mayonnaise, garlic, lemon juice, salt, and pepper.

   Salt early and throughout the cooking process. Salt added at the beginning penetrates the food; salt added at the end sits on the surface. Both are important, but the foundation matters most.

3. Grill the eggplant over high heat for 3 minutes per side until charred and tender. Remove.

   Clean and oil the grates before cooking. A clean, oiled grate prevents sticking and creates those distinctive grill marks that signal proper heat contact.

4. Toast the ciabatta cut-side down on the grill for 1 minute.

   Clean and oil the grates before cooking. A clean, oiled grate prevents sticking and creates those distinctive grill marks that signal proper heat contact.

5. Assemble. Spread garlic mayo on both halves. Layer grilled eggplant, mozzarella, roasted red peppers, arugula, and basil. Drizzle with balsamic glaze. Close the sandwich.

   Roasting at high heat creates caramelization on the surface while the interior cooks gently. Don't crowd the pan — overcrowding traps steam and prevents browning.

Equipment

• Grill or grill pan Recommended: Lodge Pre-Seasoned Cast Iron Grill Pan
• Pastry brush Recommended: OXO Good Grips Silicone Pastry Brush
• Tongs Also good: Wok Spatula

Chef Notes

• The most important thing: Salt the eggplant slices and let them sit for 20 minutes. Eggplant is a sponge — salting draws out moisture and collapses the air pockets. Unsalted eggplant absorbs oil like crazy and steams instead of grilling. Salted eggplant grills beautifully and has a meaty, concentrated texture.
• Pat the salted eggplant dry before oiling and grilling. The drawn-out moisture needs to be removed or it creates steam on the grill.
• Grill over high heat for 3 minutes per side. You want char marks and tender flesh, not mushy eggplant. The slices should hold their shape.
• Toast the ciabatta on the grill for 1 minute — cut side down. Toasted bread holds up to the juicy fillings without getting soggy.
• This is a Mediterranean vegetarian sandwich that's satisfying enough to make meat-eaters forget there's no protein. The eggplant, when properly grilled, has a meaty, smoky quality.

Common Substitutions

Ingredient	Substitution	Notes
Eggplant	Grilled zucchini	Less meaty, still good
Ciabatta	Focaccia or sourdough	Different bread, same idea
Fresh mozzarella	Burrata or goat cheese	Creamier
Balsamic glaze	Pesto	Different flavor profile
Arugula	Spinach or mixed greens	Less peppery

What You're Practicing

Grilled eggplant sandwich teaches you eggplant preparation — salting, draining, and grilling to transform a spongy vegetable into a meaty, flavorful component. This technique is essential for eggplant parmesan, baba ganoush, and moussaka. Visit Techniques for more on vegetable grilling.

You're also learning sandwich architecture — layering flavors and textures (creamy spread, smoky vegetable, fresh greens, acidic glaze) for a balanced bite. Explore more at Techniques.