Grilled Flatbread with Vegetables

1: Preheat the oven to 450°F.

2: Combine sweet onion, red onion, red pepper, mushrooms, olive oil, balsamic vinegar, minced garlic, salt, and pepper in a bowl.

3: Spread the mixture on a greased baking sheet and roast until caramelized.

4: Brush the flatbread with olive oil.

5: Grill the flatbread over medium-high heat for 3-4 minutes on each side.

6: Spread the caramelized mixed vegetables over the grilled flatbread.

7: Optional: Add goat cheese on top of the vegetables and drizzle with balsamic reduction.