Frittata Egg Muffins

Bahan-bahan (6 porsi)

• 6 eggs ((large or medium))
• ½ tsp salt
• ¼ tsp black pepper
• 3/4 cup chopped spinach (baby or normal Spinach, or similar leafy greens)
• 1/2 cup diced red capsicum / bell pepper
• 8 cherry tomatoes (, quartered (Note 1))
• ½ cup shallots (, finely sliced)
• 70 g / 2.5 oz feta (, crumbled (about 1/2 cup))
• Oil spray (, for greasing muffin tin)