Florentine Meatballs

Florentine Meatballs
adapted from Rachael Ray 30 Minute Meals, Food Network

Ingredients:
10 ounces frozen spinach , defrosted
2 pounds ground sirloin
1/2 medium onion, chopped fine
3 cloves garlic, minced
1 large egg, 2 if mixture is dry
1/4 cup milk
3/4 cup Italian bread crumbs
1/2 cup Parmigiano-Reggiano cheese, freshly grated
Coarse salt , to taste
freshly ground black pepper, to taste

Directions:
1. Preheat oven to 400ºF.
2. Wring defrosted spinach dry in a clean kitchen towel. Place sirloin in large bowl and make a well in the middle. Add the spinach, onion, garlic, egg, milk, bread crumbs, grated cheese, salt, and pepper. Mix well. Form into 30 balls. Arrange on a half-sheet pan lined with parchment paper. Roast for 20 minutes.