Frittata with Green Vegetables and Cheddar | RICARDO

Ingredients

• 6 eggs
• 1/3 cup (75 ml) strained tomatoes or tomato sauce
• 1 cup (100 g) sharp cheddar cheese, grated
• 2 tbsp basil leaves, torn
• 2 zucchini, thinly sliced into half-moons
• 1 onion, chopped
• 2 tbsp butter
• 2 cups (50 g) baby spinach, lightly packed