I am always looking for snacks that are tasty and easy and this recipe for Mexican Pinwheels from the American Diabetes Association is one that you can make ahead of time and bring for lunch at work:

Mexican Pinwheels
Serving Size: 1 tortilla roll, sliced into pinwheels
Total Servings: 1
Prep time: 15 minutes
Chilling time: 2 hours

Ingredients:
2 Tbsp canned fat-free refried beans
1 10-inch tortilla
2 Tbsp diced tomato
2 Tbsp drained cooked corn, cooled
1 Tbsp reduced-fat sharp cheddar (optional)
1/2 Tbsp finely chopped cilantro (optional)
2 Tbsp mashed avocado
1 Tbsp fat-free sour cream
2 Tbsp salsa

Directions:
Spread the refried beans on the tortilla. Sprinkle tomato, corn, and if desired, cheese and cilantro onto refried beans. Mix avocado, sour cream, and salsa. Spread on top. Roll up, chill for at least 2 hours. Slice into 1-inch pinwheels.

For the nutritional information, just read more

*Nutrition information does not include optional ingredients.
Exchanges: 3 1/2 Starch, 1 1/2 Fat

Calories 338
Calories from Fat 84
Total Fat 9 g
Saturated Fat 1.9 g
Polyunsaturated Fat 1.4 g
Monounsaturated Fat 5.3 g
Cholesterol 1 mg
Sodium 565 mg
Total Carbohydrate 54 g
Dietary Fiber 6 g
Sugars 5 g
Protein 10 g

Source