01 - 
                Halve or quarter the baby potatoes into uniform pieces. Wash and trim green beans. Slice the yellow onion into wedges or thin slices. Cut sausage into 1-inch diagonal slices.
              
              
              
                02 - 
                Combine garlic powder, salt, Italian seasoning, and ground black pepper in a small bowl.
              
              
              
                03 - 
                Place potatoes, green beans, onion, and sausage into a large mixing bowl.
              
              
              
                04 - 
                Drizzle olive oil over the mixture, then sprinkle the seasoning blend. Toss thoroughly to ensure an even coating on all ingredients.
              
              
              
                05 - 
                Line a baking sheet with parchment paper and spread the sausage and vegetable mixture in a single, even layer.
              
              
              
                06 - 
                Bake in a preheated oven at 400°F for 30 to 40 minutes, stirring halfway through to promote browning, until potatoes are tender and vegetables are lightly caramelized.
              
              
              
                07 - 
                Transfer to serving plates and garnish with chopped fresh parsley.