A medium onion (about 110 grams) typically contains the following nutrients: 

Calories: 44 kcal
Water: 89.11 g
Protein: 1.21 g
Total Fat: 0.16 g
Carbohydrates: 10.27 g (Dietary Fiber: 1.9 g, Sugars: 4.73 g)

Vitamins:
Vitamin C: 7.4 mg
Vitamin B6: 0.12 mg
Folate (B9): 19 mcg

Minerals:
Calcium: 23 mg
Iron: 0.21 mg
Magnesium: 10 mg
Phosphorus: 29 mg
Potassium: 146 mg
Sodium: 4 mg

Onions are a good source of vitamins and minerals, particularly vitamin C, which is an antioxidant and is necessary for the repair of tissues and the absorption of iron. 

Please note that the exact nutritional content can vary based on the size of the onion, its variety, and how it is prepared and cooked.

Nutrition facts of a Chicken Shami Kabab (50 grams) are:

• Calories: 135
• Fat: 3.3g
• Sodium 40mg
• Carbohydrate: 3.3g
• Fiber: 1g
• Protein: 13.2g
• Calcium: 20mg
• Iron: 0.5mg

Shami Kabab is rich in protein and usually has a higher percentage of fat if chicken is used. Other micro-nutrients include sugar, fiber and a lot of sodium. 

Nutrition facts of one can (165 grams) of a Tuna Fish are:

• Calories: 191
• Fat: 1.4g
• Sodium: 83mg
• Protein: 42g
• Iron: 2.52mg
• Magnesium: 44.6mg
• Potassium: 391mg
• Selenium: 133mcg
• Vitamin B6: 0.577mg

Tuna fish is a good source of vitamins and minerals.

Nutrition facts of a milk chocolate bar (25 grams) are:

• Calories: 134
• Fat: 7.6g
• Sodium: 21mg 
• Protein: 1.9g 
• Carbs:  14.3g (Sugars: 14g)
• Calcium: 45mg
• Iron: 0.6mg
• Potassium: 90.5mg
• Caffeine: 5mg

Milk Chocolate is generally rich in carbs and calories.

 One cup of Pineapple Juice (250 grams) contains:

• Calories: 132
• Fat: 0.02g
• Carbs: 33g (Sugars: 25g)
• Fiber: 0.5g
• Iron: 0.78mg
• Vitamin A: 0mcg 
• Vitamin C: 109.5mg 
• Calcium: 32mg
• Protein: 0.9g
• Potassium: 325mg
• Sodium: 5mg 

Pineapple juice is particularly rich in manganese, copper, vitamin B6 and vitamin C.