Slow-Cooker Ratatouille

Place eggplant in a colander over a plate; sprinkle with 1 teaspoon salt and toss. Let stand 30 minutes. Rinse and drain well. Transfer to a 5-qt. slow cooker coated with cooking spray., Stir in tomatoes, zucchini, onions, green and yellow peppers, olives, tomato paste, basil, garlic, pepper and the remaining salt. Drizzle with oil. Cover and cook on high until vegetables are tender, 3-4 hours.