Preheat oven to 450°F.
In a sauté pan, melt butter over medium heat.
Heat until bubbly and golden brown, then add garlic and remove from heat.
In a blender, combine eggs, milk, olive oil, cooled brown butter + garlic mixture, sea salt, and flour.
Blend until combined. Then, add parmesan, and blend again for a few seconds.
Grease a muffin tin or popover pan with butter or cooking spray.
Place in the oven for 3-4 minutes to heat up.
Pour the batter evenly into popover pan / muffin tin, nearly to the top.
Cook for 15 minutes.
Turn oven temperature down to 375°F and cook an additional 10-15 minutes until golden brown and puffed.
Pierce each popover with a knife to release steam and let cool slightly before serving with butter, garlic butter, or olive oil.