Preheat your oven to 425°F (220°C).
Prepare the vegetables by dicing the eggplant, zucchini, and bell peppers while halving the cherry tomatoes.
Place all the diced vegetables and halved tomatoes in a large mixing bowl.
Drizzle the olive oil over the vegetables, adding salt, pepper, oregano, and balsamic vinegar. Toss well.
Spread the vegetables evenly on a baking sheet lined with parchment paper.
Roast the vegetables in the preheated oven for 25-30 minutes, stirring halfway through.
Once roasted, take the vegetables out of the oven and let them cool slightly before serving.
Garnish with fresh basil before serving for added flavor.