Savory Meatloaf with Caramelized Onion Gravy

### Instructions:

#### Step 1: Prepare the Meatloaf

1. **Preheat your oven** to 375°F (190°C). Grease or line a loaf pan with parchment paper for easy cleanup.

2. In a large bowl, combine the ground beef (or beef and pork mixture), finely chopped onion, breadcrumbs, milk, egg, Worcestershire sauce, Dijon mustard, thyme, salt, and pepper.

3. **Mix everything together** until just combined. Avoid overmixing, as this can make the meatloaf dense.

4. Transfer the mixture into the prepared loaf pan and shape it into a loaf shape. Smooth out the top to ensure even cooking.

5. **Bake in the preheated oven** for about 50-60 minutes, or until the meatloaf reaches an internal temperature of 160°F (71°C) and is no longer pink in the center. If you prefer a crispier crust, you can broil it for the last 5 minutes of cooking.

#### Step 2: Make the Caramelized Onion Gravy

1. While the meatloaf is baking, heat the olive oil or butter in a large skillet over medium heat.

2. **Add the sliced onions** and cook, stirring occasionally, for 20-25 minutes. The onions should soften and turn golden brown, releasing their natural sweetness. Be patient and don’t rush this step—it’s key to developing the flavor.

3. Once the onions are caramelized, sprinkle in the flour (if using) and stir for 1-2 minutes to cook out the raw taste of the flour.

4. **Add the beef broth** (or chicken broth), balsamic vinegar, thyme, salt, and pepper. Stir to combine, scraping up any flavorful bits from the bottom of the pan.

5. **Simmer** for 5-10 minutes until the gravy thickens to your desired consistency. If it’s too thick, you can add a little more broth to loosen it up.

6. Taste and adjust seasoning as needed.

#### Step 3: Serve and Enjoy!

1. Once the meatloaf is done, **remove it from the oven** and let it rest for 5-10 minutes before slicing.

2. Spoon the caramelized onion gravy over the meatloaf slices and serve with your favorite sides, like mashed potatoes, roasted vegetables, or a simple green salad.

### Tips for Perfect Meatloaf:
– **Add moisture:** If you find your meatloaf is too dry, adding a bit of ketchup, tomato sauce, or even grated vegetables (like zucchini or carrots) can help keep it moist.
– **Customize your gravy:** For a different twist, try adding a splash of red wine or a teaspoon of brown sugar to your gravy for extra depth of flavor.
– **Make ahead:** You can prepare the meatloaf mixture the night before and refrigerate it. Just bake it fresh the next day and prepare the gravy while it’s cooking.

### Why This Recipe Works:
– **Flavorful meatloaf:** The blend of beef and pork ensures a juicy, flavorful meatloaf. The combination of Dijon mustard, Worcestershire sauce, and herbs adds a savory depth that pairs perfectly with the sweetness of the caramelized onions.
– **Rich, savory gravy:** The caramelized onions in the gravy bring a rich, sweet flavor that contrasts beautifully with the savory meatloaf. The addition of balsamic vinegar gives it a slightly tangy kick, rounding out the flavors.

This Savory Meatloaf with Caramelized Onion Gravy is a true comfort food masterpiece that brings together tender, juicy meatloaf and a luscious, flavorful gravy. Whether for a weeknight dinner or a special occasion, it’s sure to become a family favorite. Enjoy!