Mushroom Swiss Cheese Meatloaf

with parchment or lightly grease a loaf pan.
Sauté the mushrooms, onions, and garlic in olive oil over medium heat until browned and most of the moisture is evaporated (about 7 minutes). Let cool slightly.
In a large bowl, combine ground beef, oats, milk, eggs, Dijon, Worcestershire, seasonings, and the sautéed mushroom mix. Mix with your hands or a spatula until just combined.
Fold in 1 cup shredded Swiss cheese. Add Greek yogurt if using for extra creaminess.
Shape the mixture into a loaf on the prepared sheet (or pack