In a medium stainless steel bowl, whisk together the deglazed ouzo, lemon juice, grated tomato, hot pepper flakes, oregano leaves and olive oil until smooth. Set aside half the mixture and toss the shrimp in the remaining half mixture and refrigerate for 30 minutes or up to 3 hours.

If using wooden skewers, soak them in warm water for a half hour.

Light the grill. Remove the shrimp from the marinade and set the marinade aside. Oil the grill rack.

Thread four alternating pieces each of shrimp and feta on each of the four skewers. Grill over medium heat, turning carefully so that the feta doesn’t fall apart. Brush with the marinade in which the shrimp were submerged. Grill until the shrimp are bright pink and cooked through and the feta seared on all sides.

Serve hot on a platter and place the remaining unused marinade in a bowl as a dipping sauce.