Heat oil in a large pot. Add onion and garlic and cook for 5 minutes, until onion is soft. Add meat and brown, breaking up with a fork, until meat is cooking through. Season with salt and pepper.
Add marinara sauce, Italian seasoning, and water. Bring to a boil. Add spaghetti (break it up in pieces). Make sure spaghetti is submerged. Cook for about 15 minutes, stirring occasionally until spaghetti is cooked and liquid is thickened. Season with additional salt and pepper to taste. Top with fresh herbs only if you need it to be pretty.