Strawberry Blueberry Balsamic Mason Jar Salad

"Confession: until a couple years ago (okay, maybe last year), I thought fruit in salads was totally gross. I know, I KNOW. What was wrong with me?! I'm not sure exactly what flipped the switch in my culinary tastes, but these days I just love love love fruit in my salads! (p.s. I totally love it). Right now in Florida (where I live!) it's blueberry season, so we're getting the most beautiful and flavorful fruits from farms that are sometimes in my own town! The kids have been teasing me because I'm adding blueberries to absolutely everything (um, have I mentioned, they're in season and taste amazing?!)"