Sheet Pan Ratatouille

Name: Sheet Pan Ratatouille
Ingredients: 1 small Japanese eggplant (sliced 1/4-inch thick); 1 small zucchini (sliced 1/4-inch thick); 1 small yellow summer squash (sliced 1/4-inch thick); 1 large orange bell pepper (seeds and ribs removed, sliced 1/4-inch thick); 1/2 red onion (sliced 1/4-inch thick); 1 pint cherry tomatoes; 4 smoked/cooked sausage links (sliced into 1-inch thick coins); 1/3 cup olive oil; 1 teaspoon dried Italian seasoning; 1/2 teaspoon garlic powder; 1/2 teaspoon coarse salt; 1/4 teaspoon ground black pepper; 1/4 teaspoon lemon pepper; chopped parsley (, for garnish)