Stay on a diet from Monday to Friday, eat normally on Saturdays and Sundays, possibly repeat the pattern for another week. This 5-day diet from nutritionist Dr. Vanessa Ascencao allows you to have a flat abdomen within a short week. Here is the super easy scheme of the 5 day diet for a flat abdomen.

THE 5-DAY DIET FOR A FLAT ABDOMEN
Breakfast:
option 1: a porridge with 200 ml of water, 40 grams of oat flakes and sweetener to taste, coffee or tea.
option 2: 25 g of puffed quinoa seeds or puffed brown rice in 150 ml of low-sugar plant milk, with cinnamon and a piece of fruit of your choice (40 g), coffee or tea.
Snack: 10 almonds or 100 gr of red fruits
Lunch: 120 gr of chicken or turkey breast or veal or Atlantic cod or natural tuna; 250 grams of grilled vegetables of your choice or raw in salads (cucumbers, tomatoes, courgettes, carrots, celery, fennel, peppers, grilled aubergines) with balsamic vinegar and a tablespoon of oil or 80 grams of avocado (instead of oil).
Snack:a cup of green tea + a glass of lemon juice (no sugar)
Dinner: a small steak or 150 grams of shellfish (net fruit) or 200 grams of shellfish of your choice, grilled, roasted or steamed; vegetables such as spinach, broccoli, asparagus, endive, chard, chicory, black cabbage, sautéed in a pan with herbs to taste and a teaspoon of oil. Free spices.

SUNDAY AND SATURDAY: you can eat freely, obviously without exceeding. Pizza, pasta, even some frying in olive oil or a dessert are ok. The pattern can be resumed for another week. In total, one and a half kilograms are lost per week.