1. Preheat oven to 350 degrees F. Combine all meatloaf ingredients, beef through garlic powder and mix until combined and starts to come together. Press about 2/3 of the meatloaf into an ungreased loaf pan, using a spoon to press it up the sides so that it forms a bowl.
2. Cook the broccoli about half of the time recommended on the package (I microwaved mine for about 3 minutes), so it will press down easily into the meatloaf. Pour into the meatloaf "bowl" and press down.
3. Cover with remaining meatloaf mixture and bake at 350 degrees for 45 minutes. Meanwhile, mix up the piquant sauce by whisking together ketchup, mustard, and brown sugar.
4. Spread sauce over the meatloaf and return to the oven for 15 minutes.