Roasted Potatoes and Onions - Easy and Delicious

Name: Roasted Potatoes and Onions - Easy and Delicious
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: American
Ingredients: 2 pounds potatoes, sliced into 1/2-inch-thick pieces; 1 onion, halved and each half cut into quarters; 0.5 cup canola oil; 0.5 cup olive oil; 4 cloves garlic, chopped; 1 envelope onion soup mix; 1 tablespoon chopped fresh rosemary, or more to taste; 1 tablespoon freshly ground black pepper