Take out of oven & uncover. Bake uncovered another 15-20 minutes until bacon is browned & at desired crispiness. Also, if desired, take back out & add a layer of ketchup across top & bake another 10-15 minutes until ketchup has carmelized into a glaze type topping. (Or use broiler & keep an eye on it until it's ready, it won't take long.)