Pesto Parmesan Spinach Balls

Bahan-bahan (10 porsi)

• 2 (10 ounce) packages frozen chopped spinach, thawed and drained very well
• 4 eggs, beaten
• 1 cup grated Parmesan cheese
• 1/2 cup prepared pesto
• 1 small yellow onion, grated
• 1/2 teaspoon garlic powder
• 1 1/2 - 2 cups Italian seasoned bread crumbs
• Marinara, to serve (optional)