Stashcook | Mediterranean Portobello Burger with Feta & Olive Spread

Ingredients

• 4 large portobello mushroom caps
• 1/2 cup crumbled feta cheese
• 1/4 cup chopped Kalamata olives
• 1/2 cup mayonnaise
• 1 teaspoon dried oregano
• 1/2 teaspoon garlic powder
• 1 tablespoon extra virgin olive oil
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 4 whole grain hamburger buns
• 1/2 head butter lettuce
• 1/2 English cucumber, diced
• 4 sun-dried tomatoes in oil, chopped
• 1/4 cup plain Greek yogurt
• 1 tablespoon lemon juice
• 1 large tomato, sliced