Heat the olive oil in a skillet over medium heat and sauté the minced garlic until fragrant, about 30 seconds, filling the kitchen with a warm aroma.
Add the chopped spinach to the skillet and cook until just wilted, about 2-3 minutes, stirring frequently. Remove from heat and let it cool slightly.
Transfer the cooked spinach to a mixing bowl and add the shredded cheese, breadcrumbs, beaten egg, salt, and pepper. Mix everything together until well combined and sticky.
Use your hands or a spoon to shape the mixture into small, compact balls, about 1 to 1.5 inches in diameter, placing them on a parchment-lined baking sheet.
Preheat your oven to 375°F (190°C). Bake the spinach balls for 15-20 minutes, or until they are golden brown and slightly crispy on the outside.
Remove the bites from the oven and let them cool slightly before serving. They should be tender inside with a light crunch on the exterior.