Capsicum, kale and feta frittata

Ingredients (1 serving)  – (double recipe for 2 servings): 1 tbs olive oil ½ small red capsicum (bell pepper), thinly sliced 1 small tomato, chopped 50g baby purple kale leaves (see note) or English spinach 2 eggs, plus 1 egg white, lightly beaten 25g feta, crumbled Chopped flat-leaf parsley leaves, to serve   Method: Preheat…