Zucchini Frittata Recipe

INGREDIENTS

• 1 onion, sliced
• 3 tablespoons butter
• 1/8 teaspoon sugar
• 12 ounces zucchini (1 large zucchini or 3 small zucchini)
• salt and freshly ground black pepper
• 5 eggs
• sprig of fresh thyme (or 1/4 teaspoon dried thyme)
• 1 tomato
• 4 ounces goat cheese