Start by preheating your oven to 200°C (390°F) and lining a baking sheet with parchment paper or a silicone mat.
In a large mixing bowl, combine the ground beef, breadcrumbs, minced garlic, beaten egg, chopped parsley, red pepper flakes, lemon zest, and a drizzle of olive oil. Gently mix everything together with your hands or a spoon until just combined—try not to overmix to keep the meatballs tender.
Using a small scoop or spoon, shape the mixture into small, uniform balls about 2.5 cm (1 inch) in diameter. Place each meatball evenly spaced on your prepared baking sheet.
Lightly brush the meatballs with a bit of olive oil using a pastry brush; this helps achieve a crispy, golden exterior during baking.
Bake the meatballs in the preheated oven for about 15 to 18 minutes, turning on the broiler for the last 2 minutes if you want extra crispy edges and a deep golden color.
Check for doneness: the meatballs should be golden brown with crispy edges, and an internal temperature of at least 70°C (160°F). They should feel firm yet juicy when gently pressed.
Let the meatballs rest for 5 minutes on the baking sheet to settle their juices. Serve warm, garnished with extra parsley or a squeeze of lemon if desired, for a perfect bite of crispy, savory goodness.