Preheat oven to 350ºF. Grease a mini-muffin tin with olive oil or cooking spray.

Place the almonds in a food processor and process them until they're coarsely ground; transfer to a mixing bowl.

Place the broccoli florets in the food processor and pulse until chopped. Combine the ground almonds, broccoli, cheese, and garlic in the mixing bowl. Season to taste with salt and pepper, then fold in the egg.

Form the broccoli mixture into 12 balls, squeezing them a little to make sure they hold their shape, and place each one in a cup in the muffin tin.

Bake the meatballs for about 20 minutes, or until they're golden-brown and slightly crispy on the outside. Remove the tin from oven and cool for 5 minutes; to remove the meatballs, run a butter knife along the edges of each muffin cup to loosen before gently popping them out.