Preheat the oven to 350 deg. (F)
Coat a medium-sized casserole dish or 8"x8" pan lightly with cooking spray.
In a bowl, combine the flour, oats, sugar, and oil, and blend with a fork until crumbly.
Dump the carrots into the casserole dish, and top with the flour mixture. Make sure the topping covers the carrots completely.
Bake for 30-40 minutes, or until the topping is crispy.