Talk about a delicious sandwich. I got two large portobello mushrooms in my vegetable delivery, and I just didn’t know what to do with them. David doesn’t like mushrooms, so a large risotto was out of the question. Here is a very simple, healthy, vegetarian sandwich that I think is perfect for a warm summer day. It just screams freshness!
To make the burgers, take 1 large portobello mushroom per burger, and drizzle the top of the cap with olive oil. Then, sprinkle on some salt and pepper. Grill the caps top-side down, covered, for about 8-12 minutes until they are fork-tender.
I cooked my mushrooms on a grill pan over medium-high heat, and I tented them with tinfoil to keep the heat in. While your mushrooms cook, toast a hamburger bun or a ciabatta roll, and prepare your toppings.
I spread some olive tapenade on the bottom piece of bread and dijon mustard on the top piece. On top of the mushroom, I placed a sliced tomato and a heaping handful of fresh arugula. I made another sandwich the next day with the second, cold mushroom, and it was even more refreshing. It tasted less mushroomy when it was cold too. Maybe David would have even liked it, but it wasn’t around long enough for him to get the chance to taste it. No regrets!
Shopping list:
- Portobello mushroom cap
- Roll
- Tomato
- Arugula
- Dijon mustard
- Olive tapenade
- Olive oil, salt, and pepper

Yum, thats whats for dinner tonight, Thanks
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Harvester’s breakfast menu in the UK is packed with hearty and delicious options, perfect for starting your day off right. From their classic cooked breakfasts featuring bacon, eggs, sausages, and hash browns, to lighter choices like pancakes and fresh fruit, there’s something to satisfy every appetite. They also offer a great selection of vegetarian and vegan breakfast dishes, ensuring there’s something for everyone. With unlimited tea, coffee, and toast included, Harvester’s breakfast is an affordable and tasty way to enjoy a morning meal.
That sounds like a delicious portobello mushroom sandwich! If you’re ever craving a similar, hearty vegetarian option, you should check out Cheddar’s Scratch Kitchen. They offer scratch-made dishes with fresh ingredients, and their vegetarian-friendly items like grilled portobello mushroom entrées or sandwiches would fit right in with this recipe. Plus, the quality and care they put into every dish at Cheddar’s make it a great place to enjoy wholesome meals when you’re not cooking at home. Your sandwich looks amazing, and I might have to try adding that olive tapenade for extra flavor!
That’s a fantastic choice, especially if you’re looking for a flavorful, meat-free option. The Portobello mushroom acts as a juicy, hearty patty with a rich, umami taste. When grilled, it gets a nice smoky flavor, making it super satisfying.
Topped with melted cheese, fresh lettuce, tomatoes, and a tangy sauce, it’s a mouthwatering alternative to a traditional burger. Plus, it’s often lower in calories, making it a lighter yet filling option.
This portobello mushroom burger looks amazing—so simple yet packed with fresh, summery vibes! I love how the olive tapenade and Dijon mustard bring that zesty kick to the juicy mushroom. It reminds me a bit of the bold flavors in Firehouse Subs’ Zesty Garlic Hook & Ladder—smoked turkey, honey ham, and that garlicky punch from the Hot Ones Garlic Fresno sauce. Your cold mushroom twist sounds perfect for a quick lunch—might try that next time I’m grilling! Thanks for sharing this veggie delight!