Add dates to food processor. Pulse, scraping down sides of bowl as needed, until dates starts to come together as a ball. Add oats, pumpkin seeds, dried apricots, dried mango and chia seeds; pulse until combined.
Scrape mixture into parchment paper-lined 8-in. (20-cm) square baking pan. Firmly press into an even layer. Cover and refrigerate 1 hr. or overnight.
Cut into 20 bars to serve. Store refrigerated in airtight container up to 1 week.
Substitute raisins, dried cranberries or dried cherries for mango or apricot. Also delicious made with any seed or nut, such as sunflower seeds, pecans, almonds, peanuts.