Protein-Packed Veggie Egg Muffins

Ingredients

• 1/2 cup cherry tomatoes, halved
• 1/2 cup onion, chopped
• 1 cup bell peppers, chopped
• 1/4 tsp ground black pepper
• 1 cup turkey sausage, cooked and crumbled
• 2 cups egg whites
• 1 cup spinach, chopped
• 3/4 tsp kosher salt