Combine the meats in a large bowl. Add the onions, Garlic, Bread Crumbs, Cheese, and Tapenade. Mix gently until everything seems blended.
Lightly beat the eggs and add them to the bowl. Mix just until eggs are incorporated. Let mixture chill for 1-2 hours to allow flavors to blend. Make Sauce while the meat chills.
Heat Olive Oil in a small saucepan over medium heat. Add the onions and garlic (and the pepper flakes if you are using them) and cook for a few minutes, until the onions are translucent and the garlic is fragrant.
Add the tomatoes and continue to cook until the tomatoes begin to burst. Thirty minutes or more is perfectly fine. Set aside.
Form the meat into one large or two small loaves. Pack gently but firmly and place on a rimmed baking sheet. Bake at 350 degrees for 20 - 30 minutes depending on number of loaves.
Top with the Cherry Tomato Sauce and a sprinkle of Asiago (or any Italian cheese). Return to the oven for another few minutes until the cheese is melted Allow to rest 5 minutes before slicing.