Cut up the eggplant into cubes and place on a plate or in a bowl. Sprinkle salt over it and let it sit for 10 minutes.
When the eggplant is ready, add oil to a skillet or large pan over low/medium heat. Add eggplant and cook until soft, stir occasionally and cover the pan to help the eggplant cook faster.
Add onion, garlic, and bell pepper to the pan and saute until the pepper is soft, about 8-10 minutes.
Add diced tomatoes, olives, caper, ¼ tsp of salt, and pepper and bring the sauce to a low boil over medium heat, then lower heat and let simmer for 5-10 minutes.
Remove from heat and enjoy with some toast, plain, or with a protein!