Full-of-greens frittata

Ingredients (4 servings): 250g baby spinach leaves 2 teaspoons olive oil 1 garlic clove, crushed 250g zucchini (baby marrow), coarsely grated 1 teaspoon finely grated lemon rind 4 eggs 4 egg whites 100g feta 2 tablespoons finely grated parmesan ¼ cup chopped fresh chives 100g skinless roasted red capsicum, finely chopped (optional)   Method: Preheat…