French Onion Meatloaf - Food By The Gram

Ingredients

• 1 lb lean ground beef (I used a 93%)
• 2 large onions (sliced thin)
• 2 tbsp balsamic vinegar
• 1/4 cup beef broth
• 1/2 cup breadcrumbs (plain or Italian)
• 1 large egg
• 1/4 cup French onion soup mix (1 packet is 1/4 cup)
• 1 cup shredded Gruyère cheese
• 1 tsp dried thyme
• Fresh parsley (chopped (for garnish))