Norwegian Meatballs

I tried to find this recipe on this site and couldn't, so I apologize if it's been posted before. This is a family tradition for us. My mom makes these meatballs every time we have a big family gathering and everybody eats until they're sick! :) They're just amazing!

• Ready In: 1 hr
• Serves: 8-10

Ingredients

• 2  tablespoons butter
• 1  medium onion
• 1  lb hamburger
• 1⁄4 lb ground pork
• 1⁄2 cup  breadcrumbs
• 1⁄2 cup milk
• 1  egg, beaten
• 2  teaspoons sugar
• 1 1⁄4 teaspoons salt
• 1⁄2 teaspoon nutmeg
• 1⁄4 teaspoon allspice

Directions

1. Saute onion in butter in a skillet until clear, but not brown. Add remaining ingredients. Make small meatballs. Brown in 2 Tbs. butter. Remove from skillet and put in casserole dish.
2. Put in skillet:2 Tbs. butter, 1 cup milk, ¼ teaspoons pepper, ½ teaspoons salt, and 1 teaspoons sugar.
3. Dissolve cornstarch (3 Tbs.) in a little water. Add to liquid. When thickened, pour over meatballs. Bake about 40 minutes at 350 degrees.