Vegetable Frittata | Healthy Egg and Cheese Breakfast Recipe

Ingredients

• 8 large eggs
• ½ cup milk
• ½ tsp. salt, divided
• ½ tsp. pepper, divided
• 1 cup shredded sharp cheddar cheese, divided
• 1 Tbsp. olive oil
• 2 garlic cloves, minced
• ½ red onion, diced
• 1 small sweet potato, chopped
• 1 small zucchini, chopped
• 1 medium red pepper, chopped
• 2 cups baby spinach