Heat olive oil in a medium skillet over medium heat
When hot, add the onions and garlic and cook until translucent and fragrant
Add the tomato paste, chopped basil, chopped parsley, salt, and pepper
Cook about a minute, stirring constantly, then remove from heat and set aside
Combine panko and buttermilk and set aside for about 5 minutes
In a large bowl, combine the ground beef and Italian sausage
To the combined meat, add the cooled herb/tomato paste mixture, parmesan cheese, and panko/buttermilk mixture then gently work the entire mixture with your hands until well combined
Shape the mixture into a free-form loaf on the prepared baking sheet.
Reserve a small portion (⅓ a cup of 1x recipe) of the glaze and set it aside
Brush (with the glaze in the sauce pan) onto the loaf to coat
Put the loaf in preheated oven to bake for 50 minutes or until meat thermometer reads 160℉
While the meatloaf is cooking, generously brush it every 10 minutes with the glaze from the sauce pan (not the reserved glaze).
When the meatloaf is done, allow it to stand for 5 minutes before slicing.
Serve with the reserved glaze, a green salad, and potatoes. Leftovers are amazing, especially between slices of hearty white bread or on a hoagie roll!