Preheat your oven to 350°F (175°C) and line a 9x5 inch loaf pan with parchment paper.

Sauté diced yellow onion and minced garlic in a skillet over medium heat until soft, about 5 minutes.

In a large bowl, whisk together eggs, milk, breadcrumbs, Parmesan cheese, parsley, Worcestershire sauce, salt, and pepper. Let sit for 5 minutes.

Add ground beef, ground pork, and cooled onion-garlic mixture to the bowl and gently mix until combined.

Transfer the mixture to the loaf pan, pressing down to eliminate air pockets and smoothing the top.

In a separate bowl, whisk together BBQ sauce, honey, grape jelly, apple cider vinegar, and Dijon mustard until smooth.

Spread one-third of the glaze over the top of the meatloaf.

Bake for 45 minutes, then remove and spread another one-third of the glaze over the top.

Return to the oven and continue baking for an additional 25 to 30 minutes, until the internal temperature reaches 160°F.

Allow the meatloaf to rest for 10 minutes before slicing and enjoy with remaining glaze.