Preheat the oven to 400 F and lightly grease a large casserole dish.
Heat the oil over medium-low heat in a pan. Add the onion and allow to cook on low for 5 minutes. Lightly salt and add the coconut sugar. Cook for another 5 minutes, until the onions soften but don't fully caramelize. Set aside.
Combine the sauce ingredients and whisk well.
Add the ramen bricks to the casserole dish along with the onions, ground beef and sauce. Cover and transfer to the preheated oven.
Bake for about 25 minutes. Carefully remove the cover and separate the ramen bricks with a fork. Toss and mix well.
Return to the oven and bake for another 10 minutes covered or until the noodles are soft.
Serve as is topped with fresh thyme, or add the cheese and allow to melt for 5 minutes.