Potatoes and spinach come together in these irresistible little bites with a surprise of melty mozzarella in the middle. They're hearty enough to satisfy, fun enough for a party, and the kind of snack you'll want to keep reaching for.
• Drain the spinach very well. Excess moisture can make the potato mixture too soft.
• Squeeze as much water as possible from the soaked bread before blending it with the spinach.
• Make sure the mozzarella is completely enclosed so it doesn't leak during frying.
• If the potato mixture feels too soft to shape, refrigerate it for 15–20 minutes before forming the balls.
• Don't skip the short freezing step; it helps the balls stay together while frying.
• Fry in small batches so the oil temperature stays consistent.
• These are best served fresh while the coating is crisp and the cheese is melted.