Strawberry Rhubarb Crisp

I was having my parents over for dinner yesterday. The day before, I warned them that there would be no dessert. I expected them to say 'that's fine honey, no problem' or 'we don't need dessert, anything you make is wonderful' or 'don't go to trouble for us'. Instead,. what i got was dead silence. So I figured I should make a dessert. I found rhubarb in my fridge that I'd forgotten about, that I bought at the market, and frantically started looking through my cookbooks for a recipe. I came across a crumble recipe in Canadian Cookbook,  that looked quite simple. It was super easy to make and. turned out great, I've never made a crisp before.