Healthy Burger | Big Recipe

Ingredients

• 6 ounces feta cheese
• 1/3 cup plain whole-milk yogurt
• kosher salt, to taste
• ground black pepper, to taste
• 1 teaspoon lemon zest plus 1 tablespoon lemon juice
• 1 teaspoon ground sumac
• 3 tablespoons olive oil, divided
• 1/2 large English cucumber
• canola oil, to taste, for greasing the grill grates
• 1 medium eggplant, sliced into 1/2-inch-thick rounds
• 1 large red pepper, halved and seeded
• 4 hamburger buns, split