Rinse the gizzards under cold water
Trim away any excess fat, membrane, or tough bits
Pat them dry with paper towels
Season with salt, pepper, and any preferred spices
Heat oil or butter in a skillet over medium heat
Add chopped onion and garlic if desired
Add the gizzards to the pan
Cook and stir until browned on all sides
Add a small amount of water or broth
Cover and simmer until tender
Check for doneness and cook longer if needed
Serve hot