The Easiest Way to Lose Weight QuicklyDiet plan for 3 days includes:

Day 1 

Breakfast: 1 slice of wholegrain toast with 2 tablespoons of peanut butter, 1/2 grapefruit, 1 cup of coffee or tea.

Lunch:  A slice of whole grain toast, 1/2 cup of Tuna, 1 cup of coffee or tea

Dinner: 3-Oz (85 grams) serving of any meat, 1 cup of green beans, 1 small apple, 1/2 banana, 1 cup vanilla ice cream.

Day 2

Breakfast: 1 slice of toast (whole grain), 1 hard-boiled egg, 1/2 banana.

Lunch: 1 hard-boiled egg, a cup of cottage cheese, 5 saltine crackers.

Dinner: 2 hot dogs without bun, 1/2 cup of carrots and 1/2 cup of broccoli, 1/2 banana, 1/2 cup of vanilla ice cream.

Day 3

Breakfast: 1 slice of cheddar cheese, 5 saltine crackers, and an apple

Lunch: 1 slice of toast, one egg (hard boiled or cooked according to your likes)

Dinner: A cup of tuna, 1/2 banana, 1 cup of vanilla ice cream. No snacks are allowed between meals, black coffee and green tea without sugar are allowed.The official site for this diet provides a vegetarian option, substitution ideas and diet plans for the 4 days after these 3 days. The reasons cited for rapid weight loss is that this is a low calorie diet plan, that it is a type of intermittent fasting and fasting changes the way the body works, and that the foods included in the diet plan kick start metabolism and promote fat burning.