It depends on the size of the potatoes you're parboiling, but a good rule of thumb is 5-6 minutes for small potatoes, 6-7 minutes for medium potatoes and 8-9 minutes for large potatoes.
Parboil chicken for about 10-15 minutes before cooking it.
Parboil potatoes for about 5-7 minutes before cooking them further.
Parboil ribs for about 20-30 minutes before grilling to ensure they are tender and fully cooked.
Parboil the vegetables for about 2-3 minutes before adding them to the stir-fry.
It is not necessary to parboil chicken, whether whole or parts, before grilling. But if you do choose to parboil it first, you can boil it until it's fully cooked, then grill on high heat until it's the color and outer texture you want. Or you can parboil it until it's about halfway done, then finish cooking on the grill. You can add seasonings to the water when parboiling to give it extra flavor, whether you parboil it till done, or parboil it only part done.
You do not have to parboil chicken before frying.
Parboil potatoes for about 5-7 minutes before roasting them in the oven to ensure they are cooked through and crispy on the outside.
If the water is boiling when you put them in, about 5 minutes.
One should par broil Miami ribs for 15 to 20 minutes. Take the ribs out of the water mixture and pat dry before cooking.
You may need at least one hour to boil a frozen cauliflower.
Parboil
You can parboil ham prior to roasting though it is not compulsory.Many chefs believe it is better to do so, equally there are others that disagree. It is a matter of personal preference.