Combine all the ingredients EXCEPT the olive oil, in a mixing bowl, using your hands to ensure it's well combined. It will be a bit tacky, but should form a cohesive mass.
Divide into 12 ping-pong-ball sized portions, and roll each one into a smooth ball using moistened hands. Then flatten each one into a small patty.
Sprinkle a few tablespoons of flour on a plate Gently toss each croquette in it so that it's lightly coated all over.
Set a wide skillet over medium heat. Once it's hot, add the olive oil. Pan-fry the croquettes until browned on both sides, 2 to 3 minutes per side, working in batches if necessary. Transfer the cooked croquettes to a paper towel-lined plate to drain.
Cool for 1 minute, then serve hot or warm, garnished with pinches of dried mint.