Mixed Berry Fruit Crisp

My mom is known for her incredible fruit crisps. Growing up, summertime meant playing by the pool by day and enjoying mixed berry fruit crisps by night. I happily gobbled up a serving or two, with a smile from ear to ear, each and every time! I could never quite figure out if I loved the fruity filling or the buttery oat topping more. When I began to make fruit crisps on my own, I made sure to include equal parts of both irresistible layers. Mixed berry is my favorite, but I use this recipe