How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Grilled Portobello Mushrooms, Sweet Peppers and Onions?

You need 8 ingredients. The key ingredients include: 1/2 cup balsamic vinegar, 1/4 cup olive oil (preferably extra-virgin), 2 teaspoons chopped fresh thyme, 1 teaspoon grated lemon peel, and more.

Is Grilled Portobello Mushrooms, Sweet Peppers and Onions suitable as general?

Yes, Grilled Portobello Mushrooms, Sweet Peppers and Onions falls under the General category and is a great choice for this type of meal.

How do I store leftover Grilled Portobello Mushrooms, Sweet Peppers and Onions?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Grilled Portobello Mushrooms, Sweet Peppers and Oni

Name: Grilled Portobello Mushrooms, Sweet Peppers and Onions
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1/2 cup balsamic vinegar; 1/4 cup olive oil (preferably extra-virgin); 2 teaspoons chopped fresh thyme; 1 teaspoon grated lemon peel; 6 4-inch portobello mushrooms, stemmed, gills cut out and discarded; 2 large red bell peppers, halved, seeded; 2 large yellow bell peppers, halved, seeded; 2 large red onions, cut into 1/2-inch-thick rounds

Try this homemade Grilled Portobello Mushrooms, Sweet Peppers and Onions recipe the whole family will love. Made with balsamic vinegar, olive oil, thyme…

This Grilled Portobello Mushrooms, Sweet Peppers and Onions relies on simple, everyday ingredients such as balsamic vinegar, chopped fresh thyme and grated lemon peel. It comes together quickly and makes 4 servings, at about 225 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 General

Servings: persons

1/2 cup balsamic vinegar
1/4 cup olive oil (preferably extra-virgin)
2 teaspoons chopped fresh thyme
1 teaspoon grated lemon peel
6 4-inch portobello mushrooms, stemmed, gills cut out and discarded
2 large red bell peppers, halved, seeded
2 large yellow bell peppers, halved, seeded
2 large red onions, cut into 1/2-inch-thick rounds

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Quick Info

Servings
4 servings
Calories
225 kcal
Category
General

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