Add the olive oil (or other cooking fat) to your skillet. Add the potatoes, chicken sausage, onion, & zucchini. Cook until they reach the level doneness that you like, making sure to flip the chicken sausage while it's cooking. If you're using fresh garlic, grate a clove or two over (or add minced garlic) over the hash during the last minute of cooking. Season to taste with salt and pepper.