Heat a medium, safe nonstick skillet over medium-high heat. Add the oil and swirl to coat the pan.
Add the onion and celery and cook until soft, about 6 minutes. Add the garlic and cook until fragrant. Remove from heat.
In a blender or Magic Bullet, puree the liver.
In a large bowl, whisk the eggs. Add all ingredients and gently but thoroughly mix with hands.(NOTE: You may transfer to refrigerator to let flavors marry for 4-6 hours)
Place meatloaf in a large loaf pan set on a rimmed cookie sheet. Bake for 1 hour 30 minutes or until internal temperature reaches 160 degrees F.