Ratatouille and Goat Cheese Polenta

Name: Ratatouille and Goat Cheese Polenta
Ingredients: cooking spray; 2 large eggplants, peeled and cut into ½-inch pieces; 3 medium zucchini or yellow summer squash, cut into ½-inch pieces; 3 tbsp coarse salt; 3 tbsp unsalted butter, divided; 2 small to medium red onions, halved and thinly sliced; 3 bell peppers, cut into thin slices; 1 (14.5 oz) can chickpeas, drained and rinsed; 3 tbsp finely chopped garlic; ¼ cup all-purpose flour; ¼ cup tomato paste; 1 (28 oz) can whole peeled tomatoes; 1 tsp ground thyme; 10 grinds black pepper; ½ cup packed freshly grated Parmesan; 1 cup coarsely chopped fresh basil leaves