Make the easy marinara: In a small pot, heat the olive oil over medium heat. Toss in the onion and cook until tender, about 10 minutes. Add the garlic and cook until tender, about 5 minutes. Add the tomatoes, onion powder, garlic powder, basil, oregano, rosemary, thyme, sugar, nutmeg, pepper akes, and fresh herbs, if using, and bring to a boil. Reduce the heat to low and simmer, stirring occasionally, for about 20 minutes. Season with salt and pepper to taste. For a smoother marinara, blend with an immersion blender or in a stand blender.