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Balsamic Portobellos Caprese in a balsamic marinade are grilled then topped with fresh mozzarella, pesto, compari tomato slices and fresh basil leaves. An easy grilling recipe that's perfect for Meatless Monday in the summer!
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4.67 from 3 votes

Grilled Portobello Mushrooms Caprese

Grilled Portobello Mushrooms Caprese is an easy vegetarian recipe. Mushrooms are quickly flavored in a balsamic marinade, grilled and then topped with fresh mozzarella, pesto, tomato slices and freshbasil leaves.
Prep Time10 mins
Cook Time20 mins
Marinating Time1 hr
Total Time30 mins
Course: Appetizer, Main Course, Side Dish
Cuisine: Italian
Keyword: balsamic portobello mushroom, grilled portobello mushrooms, meatless burgers
Servings: 4
Calories: 298kcal
Author: Gwynn Galvin


  • 1/4 cup Balsamic vinegar
  • 1/4 cup olive oil
  • 1 clove garlic, minced
  • 1 Tbs. chopped fresh basil
  • 1/2 tsp. kosher salt
  • 4 Portobello caps, about 9 oz.
  • 4 slices fresh mozzarella, 4 oz.
  • 1/4 cup homemade basil pesto OR store bought prepared pesto
  • 8 slices Campari tomatoes, 2 tomatoes
  • fresh basil leaves


  • In small bowl combine Balsamic vinegar, olive oil, garlic, chopped basil and kosher salt until blended.
  • Transfer mixture to ziplock plastic bag. Add Portobello caps. Seal and marinate 30-60 minutes, turning once. Remove portobellos from bag and discard marinade.
  • Meanwhile, preheat grill for direct heat grilling.
  • Grill portobellos until tender, turning once, 9-10 minutes per side.
  • Arrange portobellos on serving platter. Top each with mozzarella slice, 1 Tbs. pesto, 2 tomato slices and fresh basil leaf.


Serving Suggestion: Serve on a ciabatta roll for a fabulous Portobello "Burger"!
Swirls of Flavor Recipe Tips
  • Make it a sandwich and serve on a roll
  • Use store bought pesto in place of our homemade pesto
  • Chop the mushrooms, mozzarella and tomatoes into bitesize pieces and toss with pasta
  • Replace the mozzarella with a vegan cheese option and you’ll have a plant based recipe


Calories: 298kcal | Carbohydrates: 8g | Protein: 9g | Fat: 26g | Saturated Fat: 7g | Cholesterol: 24mg | Sodium: 573mg | Potassium: 345mg | Fiber: 1g | Sugar: 5g | Vitamin A: 547IU | Vitamin C: 1mg | Calcium: 175mg | Iron: 1mg