It usually takes 3 to 6 days for a person to get symptoms of hand-foot-and-mouth disease after being exposed to the virus. This is called the incubation period.
Preheat oven to 400 degrees F. Cut off the brown ends of the Brussels sprouts and pull off any yellow outer leaves. Mix them in a bowl with the olive oil, salt and pepper. Pour them on a sheet pan and roast for 35 to 40 minutes, until crisp on the outside and tender on the inside. Shake the pan from time to time to brown the sprouts evenly. Sprinkle with more kosher salt (I like these salty like French fries), and serve immediately.
1 Oven temperature affects how quickly Brussels sprouts roast. 2  At 500 degrees, it could take as little as 15 minutes (though 20 is usually more like it). 3  At 300 degrees, they may need 40 minutes or even longer. 4  So test early and often to determine when your Brussels sprouts are done.