Make slaw by shredding jicama in a food processor fitted with the shredding blade. Place in bowl. To jicama, add red and yellow pepper. Toss vegetables with cilantro, vinegar, lime juice, olive oil, sugar, and salt. Reserve.
In a medium saucepan, heat olive oil over medium heat. Add onion and garlic; cook for 5 minutes or until onion is softened. Add tomato puree, Worcestershire sauce, brown sugar, orange juice, cider vinegar, salt and Dijon mustard. Stir to combine and heat for 5-6 minutes, stirring occasionally.
Add diced mango, stir to combine, and remove from heat.
Pour into the bowl of food processor and puree until smooth. Return to saucepan and add cilantro.
Stir in chicken and heat through, about 4-5 minutes. Serve on small slider rolls. Slaw may be served on top of chicken or on side.