As we know, negative calorie foods do not exist .
Every food contains calories, and calories are always a plus zero (apart from water and other zero-calorie liquids), energy terms always contribute something. We cannot ingest foods that reduce the calories we have already ingested . However, over the years so-called fat-burning foods have had a great deal of interest, which in theory have the same effect as negative calories . They do bring calories, but their digestion and assimilation pushes the body to burn more than it is getting from that same food.
In this article I found 15!

15 FAT BURNING FOODS WITH NEGATIVE CALORIES

1. Celery: the fat burner par excellence. Low in calories and plenty of water, celery provides us with fiber that acts as a scavenger of the intestine.
2. Grapefruit: Grapefruit has special viscous fibers which are aids in weight loss and aids in the metabolism of sugars.
3. Lettuce and green leafy vegetables: they have water. fiber and very few calories. The body prompts you to burn more than it consumes in lettuce.
4. Watermelon: has 90 percent water, refreshes, rehydrates, and stimulates thermogenesis from non-physical activity (Neat) thanks to its sugars.
5. Lean Protein: The body burns more calories to digest it than with other foods. They also nourish the lean mass.
6. Meat / Fish Broth: Made with bones and scraps of meat or fish, broth is an incredible source of nutrients including proteins, amino acids and collagen.
7. Yogurt: helps the good bacteria of the intestine, increases regularity, promotes the elimination of toxins.
8. Apples and oranges: these are two fruits that fight inflammation, are anticancer for various reasons, stimulate the immune system.
9. Chilli: stimulates thermogenesis thanks to capsaicin, the substance that gives us its spicy flavor and stimulates the metabolism.
10. Tomatoes: the lycopene in tomatoes stimulates the immune system and reduces the absorption of sugar in the blood.
11. Rocket: has fiber that aids digestion, and the synergy of vitamins K, C and A is a powerful fat burner.
12. Cucumbers: they have vitamin C, a large water content, are useful as natural anti-inflammatories, satiate, allow you to eat less. 
13. Asparagus: They are diuretics and help the body detoxify excess toxins and waste, so they do more than can be assimilated by eating them.
14. Broccoli: they have 30/40 calories per hundred grams, they are among the most protein-rich vegetables, they give satiety and stimulate the immune system, but always eat them cooked.
15. Coffee : it has no calories, but it stimulates the metabolism as an exciting substance, due to the caffeine, and in moderate doses it protects the liver.