Preheat the oven to 180°C (356°F).
Beat the eggs and place them in a bowl.
Finely chop chicken breast, broccoli, and bell pepper.
Add chicken breast, broccoli, bell pepper, salt, and pepper to the bowl and mix well.
Lightly oil the muffin tin and evenly fill it with the mixture.
Bake in the oven at 180°C for 20 minutes.