What are some good, healthy breakfasts and lunches?

Hi! Over summer I want to lose 10 pounds and I'm home alone with my 3 siblings until 3:00, so I need to make myself food. The only thing my mom bought us for lunch is pizza and chicken nuggets. NOT healthy! And I do have a healthy breakfast cereal but I don't want to eat that every day! I can use the stove, oven, microwave, blender, toaster, anything really! Any suggestions for healthy- AND yummy- breakfasts and lunches? Thanks!