One-pot Ratatouille Pasta

Ingredients

• 1/4 cup extra-virgin olive oil, plus more for drizzling
• 2 tablespoons tomato paste
• 1 teaspoon italian seasoning
• 1 small globe eggplant, cut into 1-inch pieces
• 1 medium onion, coarsely chopped
• 3 medium plum tomatoes, cut into 1-inch pieces
• 3 cloves garlic, finely chopped
• salt and black pepper
• 1 pound short pasta, such as rotini
• 2 medium zucchini, cut into 1-inch pieces
• 1 medium orange bell pepper, cored and cut into 1-inch pieces
• 2 basil sprigs
• freshly grated parmesan