I decided to dice the sweet potatoes because the ones I got were massive and wouldn't fit on any of my trays. They were in the oven for 30 minutes, maybe even longer since I stepped away to eat my first batch of the sauce with crackers. Speaking of I loved that sauce. I made twice as much as the recipe calls for and it's really good with sour cream and chips. I would also triple the tomatoes and sauce. I am still not 100% into cinnamon in savory dishes.