I used boneless skinless chicken thighs and did not add the crushed red pepper. The chicken was tasty by itself. I didn't think the Romesco sauce did anything helpful to the dish. I know I left out the crushed red pepper, but all that would have added was heat, and not especially upped the flavor quotient. The cubed potatoes got browned on the bottom where they were resting on the pan, but were just soft on the other sides. I made this on foil lined parchment paper so that cleanup was easy. If you like broccoli, potatoes, and chicken, you will like this. However, the only real seasonings were salt and pepper...and some olive oil. Although the Romesco sauce should have added some excitement to the flavor, it just didn't do it for me. It tasted good, but didn't add any special dimension to the chicken, potatoes, or broccoli. We don't like spicy, so it wouldn't have worked for us to add the crushed red pepper. This recipe took me an hour and 5 minutes from start to finish.