Slate-Grilled Porterhouse, Summer Vegetables, and Sourdough Bread
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 28 Jan 2026
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This slate-grilled porterhouse steak is a spectacular high-protein dish that brings a touch of theatre to the classic summer barbecue. By using a natural slate tile directly on the grill, you achieve an incredibly even sear on the beef while infusing the meat with a rustic, smoky aroma. The porterhouse, seasoned with fragrant herbes de Provence, is paired with a vibrant medley of Mediterranean vegetables including aubergine, courgette, and beefsteak tomatoes, all charred to sweet perfection on the same heated stone.
Ideal for outdoor entertaining, this hearty meal is designed for sharing and celebrates the best of seasonal produce. The addition of thick wedges of garlic-rubbed sourdough adds a satisfying crunch, making it a complete, balanced feast for friends and family. Not only does the slate method provide a unique cooking surface, but it also serves as a beautiful natural platter for presenting your colourful grilled vegetables alongside the succulent, perfectly rested steak.
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Ingredients for Slate-Grilled Porterhouse, Summer Vegetables, and Sourdough Bread
60ml olive oil plus more for slate
2 2-2 1/2"-thick porterhouse steaks (about 1.8kg total), room temperature
40g herbes de Provence
Kosher salt, freshly ground pepper
3 small Italian aubergines (about 675g), halved lengthwise
6 small beefsteak tomatoes (about 900g ), halved crosswise
3 small courgette (about 450g ), halved lengthwise
3 portobello mushrooms (about 450g ), stems removed
2 large red peppers (about 450g ), cut lengthwise into 1 1/2" strips
6 garlic cloves, thinly sliced
1/3 cup fresh rosemary leaves
1/2 cup olive oil
Kosher salt, freshly ground pepper
1 medium round loaf sourdough bread (about 675g), cut into 1" wedges
60ml olive oil
1 garlic clove, halved
Kosher salt
Special equipment: A few 16x16" untreated natural slate floor tiles 1/4-1/3" thick (in case one breaks)
How to make Slate-Grilled Porterhouse, Summer Vegetables, and Sourdough Bread
Back to contentsIf using a charcoal grill, prepare for high heat. Place slate on grill grates and heat (don't worry if it splits or cracks; it can still be used). If using a gas grill, place slate on grates, then heat grill to high (cover grill while heating and grilling). Using paper towels and long-handled tongs, lightly coat slate with oil.
Sprinkle steaks with herbes de Provence and season with salt and pepper, pressing gently to adhere. Drizzle each steak with 2 tablespoons oil to moisten herbs. Grill on hot slate until an instant-read thermometer inserted into the thickest part registers 46°C for medium-rare (the temperature will continue to rise as steaks rest), 10-15 minutes per side.
Transfer to a cutting board or platter and let rest 20 minutes before slicing.
If using a charcoal grill, coals should have cooled to medium heat. If using a gas grill, reduce heat to medium high.
Cut a small strip from rounded side of aubergine halves so they will lie flat. Combine aubergines, tomatoes, courgette, mushrooms, peppers, garlic, and rosemary on a rimmed baking sheet; drizzle with oil, season with salt and black pepper, and toss to coat. Place vegetables on slate and grill until browned and tender, 5-8 minutes per side. (Some vegetables may cook faster than others.) Transfer to a platter.
If using a charcoal grill, coals should still be around medium heat. If using a gas grill, keep heat at medium-high.
Drizzle both sides of each slice of bread with oil. Place bread on slate and grill until golden brown, about 2 minutes per side. Transfer to a serving board or plate, rub both sides of bread with garlic, and season with salt.
Serve steaks with grilled vegetables and bread alongside.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
28 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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