Preheat oven to 400 degrees F (200 degrees C). Line a baking sheet with aluminum foil.
Combine olive oil, curry powder, lemon juice, salt, and ground black pepper in a bowl. Add cauliflower and toss until well coated. Place in a single layer in the prepared baking sheet.
Bake in the preheated oven until golden and crispy, about 25 minutes.
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