Crustless Spinach and Cheese Quiche

Bahan-bahan (4 porsi)

• 1 teaspoon olive oil
• ⅔ cup diced onions
• 3 to 4 cups fresh baby spinach leaves
• 1 medium garlic clove, (minced)
• 3 large eggs
• ¼ teaspoon freshly ground black pepper
• 1 teaspoon regular Spike seasoning ((or a similar seasoning))
• ½ tablespoon Worcestershire sauce
• 1 cup low fat ricotta cheese
• 2 ounces feta cheese crumbles
• ¼ cup grated Swiss cheese
• ¼ cup grated Parmesan cheese