Simple Parmesan Meatballs
- 1 pound ground beef
- 1 pound ground pork
- 2 eggs
- 1/4 water
- 1 small onion, diced
- 1 1/3 cups panko
- 1 cup grated Parmesan cheese, divided
- 2 garlic cloves, minced
- 2 teaspoons Italian seasoning
- 1 1/2 teaspoon garlic salt
- 1/4 teaspoon pepper
- 1/8 cup spinach, finely chopped