This is the 1095th most frequent Turkish word.
bol
Plentiful; abundant; spacious.
Here, "bol" is used as an adjective meaning "plenty of" or "abundant," describing the quantity of vegetables and fruits available.
Bugün pazarda bol sebze ve meyve vardı.
Today, there were plenty of vegetables and fruits at the market.
In this context, "bol" emphasizes that the pizza contains a rich and generous amount of various ingredients, acting as a qualifier of the noun "malzemeli" (with ingredients).
Annem bol malzemeli bir pizza yaptı.
My mother made a pizza with many ingredients.
"Bol" here describes the fit of the sweater, meaning "loose," and indicates that the item is spacious enough not to fit snugly to the body.