Wash the squid tubes and pat dry. Cut the feta cheese into 4 equal pieces and stuff each tube with one piece.
Heat the olive oil in a non-stick pan over medium-high heat. Add the stuffed calamari and cook for 3-4 minutes, turning occasionally, until lightly browned on all sides.
Add the minced or pressed garlic cloves and cook for 2-3 minutes, stirring frequently, until fragrant.
Drizzle with fresh lemon juice and season with salt and pepper to taste.
If desired, fry lemon wedges in the same pan for 2-3 minutes until golden, then serve.