Portobello Mushroom Gyro Recipe

Name: Portobello Mushroom Gyro Recipe
Ingredients: 4 large portobello mushrooms; 3 cloves garlic, divided; 3 tablespoons olive oil, divided; Juice of one lemon, divided; 1 teaspoon oregano; 1 teaspoon salt, divided; ½ teaspoon garlic powder; ½ teaspoon onion powder; ¼ teaspoon dried dill; ¼ teaspoon marjoram; ¼ teaspoon black pepper, divided; 1 English cucumber; 10 ounces plain Greek yogurt; 2 tablespoons fresh dill; 2 teaspoons red wine vinegar; 4 Greek pita breads; 1 tomato, diced; ¼ red onion, sliced; ½ cup feta cheese