Place a grill pan over medium high heat. Drain tuna and transfer oil to the work bowl of a mini food processer. Add garlic, thyme or rosemary, salt and pepper. Pulse to combine. Brush the vegetables on both sides with oil mixture. Grill for 3-4 minutes per side or until cooked through. Remove from heat and let cool to room temperature or chill up to 24 hours. Meanwhile, place tuna in a small bowl. Add any remaining oil mixture, stirring to combine. Chill until ready to use. Arrange vegetables on a platter or plates and top with tuna. Garnish with lemon wedges before serving.