Broccoli & Cheddar Frittata Gelson's

Ingredients

• 8 large Gelson’s eggs
• ½ cup milk
• 2 garlic cloves, pressed or minced
• ½ tsp kosher salt, divided
• Freshly ground black pepper, to taste
• 1 cup freshly grated Gelson’s cheddar cheese, divided
• 1 Tbsp extra-virgin olive oil, plus more as needed
• 1 small yellow onion, chopped
• ⅓ cup water
• 2 cups thinly sliced broccoli florets
• 2 cups roughly chopped baby spinach, loosely packed
• ⅓ cup thinly sliced green onions