Step 1

Preheat the oven to 350F. Line a baking sheet with parchment paper.

Step 2

In a large pan, melt the butter over medium-high heat. Add the onions and cook until soft. Add the garlic and stir. Remove from heat and set aside.

Step 3

In a large bowl, combine the spinach, breadcrumbs, eggs, Parmesan cheese, salt, pepper, and butter mixture. Stir to thoroughly combine.

Step 4

Using a small cookie scoop or spoon, scoop the mixture into your hands and roll into a ball and place them on the baking sheet.

Step 5

Bake for 15 to 20 minutes, until lightly browned.