Place zucchini slices in a bowl; sprinkle salt on top. Let stand for 10 minutes. Drain off excess moisture.
Heat olive oil in a skillet over medium heat. Add zucchini, garlic, and salted shrimp; cook and stir until zucchini softens, about 5 minutes. Add onion, sesame seeds, and black pepper; cook and stir until onion is translucent, about 5 minutes more.