To cook Italian sausage in the oven, arrange 12 Italian sausages in a 13-by-9-inch baking pan and add 1/2 cup of water. Sprinkle with salt, pepper, garlic powder and Italian seasoning to taste, and put the pan in an oven preheated to 350 F. Turn the sausages after 20 minutes. Return them to the oven and bake for 40 more minutes or until brown and crispy.
After baking, add your favorite spaghetti sauce to cover and top with grated cheese. Return to the oven until the cheese is melted and bubbling.
For even more flavor, try baking Italian sausages with pepper and onions. Slice 2 red and 2 green bell peppers. Thinly slice 1 large onion and chop 4 garlic cloves. Place the vegetables in a 13-by-9-inch baking dish with 2 teaspoons of oregano and 1/4 teaspoon crushed red pepper. Add 2 teaspoons of olive oil and mix it all together to coat the bottom of the pan.
Arrange 2 pounds of Italian sausages over the mixture, browned first if desired. To brown, use a heavy skillet over high heat and cook the sausages, turning often, for about eight minutes. After arranging the sausages over the vegetable mixture, put the baking dish in an oven at 350 F and allow to bake for 45 minutes.