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How would an individual in medieval times, the days of castles, knights and horses, be able to make a quick fix smoke bomb, I read out of potassium nitrate and sugar, but I'm pretty darn sure you cannot get that from bananas, he is in the jungle and has options but not a lab to assist,

Is there any recipe he could make in the wilderness to throw on a fire and make an escape using the smoke produced.
I need this though, so he can escape a staged distraction in one of my scenes, thanks for any answers.

EDIT - I felt I should add, they are raiding a town so he has maybe a halfhour to form the distraction he could fill a pit and set it ablaze, from the answers I'm seeing they would need some way to smother it as well after igniting it, but the wet grass mentioned seems like a good idea, maybe in a net to be released ontop of it. Thank you all again for the input. They are raiding it for gunpowder so at the most maybe a barrel of oil or a barrel or two of gunpowder could be used in the distraction for the fire.
There are no guns, but there is gunpowder, and oil,

Speaking from experience, the best way is to mix materials that burn well with materials that don't while limiting the amount of air that can get in. One thing that would work is to mix oil, some form of tinder and some wet grass or waterlogged wood shavings. The oil keeps the fire burning and causes the wet material to smoke more, place inside a bottle or coconut with small holes in the bottom and some larger ones on top and boom, smoke out!

Only slight problem is that if you have more oil than wet grass is that you will have a fire after a few minutes.

From the Wikipedia page on smoke bomb (emphases mine)

Home-made smoke bombs, even preceding Yale's 1848 invention, were and are most commonly used in pranks and street conflicts. They are typically made from materials that burn poorly and contained in vessels with limited air intake that thwart combustion.

You say he is in the jungle, and there is a lot of green woods there. When you burn green wood you get a lot of smoke, without needing a dedicated recipe, because the green wood contains a lot of water that thwart combustion. Even better if it is wet from rain.

Instead of a smoke bomb, you could also make a dust explosion. First the Dust acts as a cover and the explosions follows scaring any pursuers off. The ensuring chaos from the explosion then keeps anyone from chasing after your individual as they all flee for their lives. (I assume he throws it into the air, and it takes some time to reach the open fire).

Your individual would need to spend some time grinding wood or burnable materials into a fine powder and preferrably hold it in a pouch which you can later throw and set on fire. It could be even more spectacular if you could find some Magnesium to add that extra flash.

(You could also extract starch from certain plants, trees or vegetables, make it into a powder and use that if you don't like grinding wood chips all day).