Ratatouille

Name: Ratatouille
Ingredients: 2 medium eggplants (about 1 lb. total), cut into 1/2 cubes; Kosher salt; 1/4 c. extra-virgin olive oil, divided; 1 large yellow onion, chopped; 8 cloves garlic, finely chopped, divided; Freshly ground black pepper; 1 bell pepper, seeds and stem removed, chopped; 2 small zucchinis (about 11 oz. total), cut into 1/2 cubes; 1 tsp. chopped fresh rosemary; 1 tbsp. fresh thyme leaves; 1 beefsteak tomato, diced; 1 tsp. granulated sugar; 1 c. canned crushed tomatoes; 10 fresh basil leaves, thinly sliced, plus more for serving; Crusty sourdough bread, for serving