Fat is a macronutrient that your body requires for several reasons. In winter, you especially need foods that are source of good fat, as they keep you warm. It is safe to say that fats have gained popularity for all the wrong reasons, especially weight gain.
Your Diet must include: Lean meats, fish, whole grains, dairy, legumes, nuts, and seeds are high in the nutrients.
Some foods that you should try out in the winter season .

Soup

This is one of the best food that will help you live through winter easily,
Drink More Warm Water and Milk. Eat
Cauliflower and Broccoli.
Start Your Day with Porridge as well as
Consume Root Vegetables.
Increase Your Intake of Cheese, Eggs, and Fish. There are some Smart as well as Healthy High Energy Foods to Carry You Through The Winter
Steel Cut Oatmeal. Steel cut oats are packed with carbohydrates, protein, and soluble fiber, all of which boost energy.

Nuts.
Nut Butter.
Citrus Fruits.
Spinach.
Eggs.
Beans.
Salmon.
Ginger.

There are few things that can Boosting Your Winter Immune System ;
Wash your hands: Make it a habit of washing your hands every time you come home or use the bathroom and before or after every meal.

Wear a mask

Get your annual flu shot.
Get enough sleep along with plenty of water intake to stay active.
Eat a balanced, vitamin-filled diet and
Consider taking supplements.
There are 7 Best Foods To Eat In Winter Season To Stay Healthy and Fit during these chilly months:

Sweet Potatoes
Turnips.
Dates.
Nuts.
Oats.
Broccoli and cauliflower.

The foods you need to consume plentiful during the winter season .
Pomegranate is one of the most popular fruits of the winter season as it is a true anti-oxidant. Like:

Apples.
Citrus-fruits.
Onions and garlic.
Yogurt.
Mushrooms.
Honey.
Carrots.

Plenty of water to keep your body and skin hydrated. In INDIA, people preffer to have Kashmiri Kahwa, Kashmiri Tea, traditional kashmiri kahwa drink with some
Honey, Lemon, Water for the Weight Loss. Furthermore,
Masala Chai Or Masala Tea,
Honey, Ginger are comsumed by others. Tea for Cold and Cough includes;
Herbal Caffeine – Free Tea, black coffee,
Hot Mushroom Tea, Healthy Mushroom Tea, Lemon, Grass Mint Tea and
Tulsi Tea etc.

Few of the Nutrient Fiber are Food sources of Legumes (dried beans and peas), whole-grain foods and NutrientVitamin E are the Food sources that includes Avocados, nuts, seeds, whole-grain foods, and spin
Nutrient Calcium are the other Food sources that involves Non-fat and low-fat dairy, dairy substitutes, broccoli etc. Nutrient-dense foods are rich in the vitamins, minerals and other nutrients important for health, without too much saturated fat, added sugars and sodium. We can take few additional fruits, vegetables, whole grains, non-fat and low-fat dairy, fish and seafood, unprocessed lean meat and skinless poultry, nuts and legume these are some foods that may be worthy of the esteemed superfood.
Dark Leafy Greens, Berries are a nutritional powerhouse of vitamins, minerals, fiber and antioxidants.

Green Tea.
Eggs.
Legumes.
Nuts and Seeds.
Kefir (Yogurt).
Garlic.