Preheat oven to 400F. Saute spinach on the stovetop over medium heat with a couple of tablespoons of water. Cover; stir occasionally until wilted. Drain, rinse with cold water, and carefully press out excess liquid with your hands or a spatula.

Transfer spinach to a cutting board and chop finely. In a separate bowl, add all other ingredients and mix to combine. Fold in spinach. If the mixture doesn’t hold shape when scooped/packed, add another egg or more breadcrumbs until it reaches a consistency you can form into a ball (refer to tips).

Use a tablespoon to pack and form spinach balls. Place the balls in a greased muffin pan or spread them out on a baking sheet.

Bake for about 25 minutes or until golden on top and thoroughly baked through. Serve with preferred dipping sauce as an appetizer, snack, or side dish.