Peel the onion and chop into small pieces.
Peel the garlic clove, push it through a garlic press or use a small sharp knife to mince.
Mix the ground turkey meat with the chopped onions, garlic and oregano.
Add the breadcrumbs and two beaten egg yolks and mix until throughly combined.
Season with the kosher salt.
Preheat oven to 375 degree F.
Coat the inside of a casserole dish with canola or vegetable oil.
Use your hands to form the ground turkey mixture into small 1+1/2 inch balls. Place them next to each other in the oiled casserole dish.
In a saucepan over medium heat, warm the chicken or turkey broth.
When the broth is boiling, remove from the heat and pour it over the turkey meatballs.
Cover the casserole dish with aluminum foil and place in the pre-heated oven for 20 minutes.
In a separate bowl whisk together the yogurt, schmand, and egg yolks. Remove the casserole dish from the oven. Discard the aluminum foil.
Pour the creamy sauce evenly over the meatballs, sprinkle the shredded gruyere evenly over the top and place back in the oven for 20 minutes or until the cheese is melted, golden brown and bubbling.
Sprinkle additional fresh oregano, if desired, over the top before serving.
To make schmand:
• 4 oz cream cheese
• 8 oz full-fat cottage cheese
Place the cottage cheese and cream cheese in a food processor or blender and process until combined. The mixture should be completely smooth before using as an ingredient to any recipe.