Zucchini and lemon tortilla - Secretos Del Sur

Ingredients

• 2 courgette (preferably white)
• 1 onion
• 5 eggs
• 150 gr cheese (grated)
• 1 tl nutmeg
• 1 el hierba buena (or mint, finely chopped)
• 1 el dill (finely chopped)
• 2 el self-raising flour
• 1 zest of a lemon (finely grated skin)
• 2 el olive oil
• salt and pepper