Wash, dry and trim the stems of the carrots. Place the carrots on a baking sheet and drizzle with olive oil, salt and black pepper, shake to coat.
Roast the carrots until crisp-tender and slightly browned, about 35 to 45 minutes. A fork should easily go into the thickest part of the carrot.
Remove from the oven. While the carrots are still hot, season with more salt, drizzle the white truffle oil, top with lemon juice, lemon zest and crumbled feta.