This is the 13528th most frequent Polish word.
pieczonym
"Pieczonym" means "baked" or "roasted" in English.
Here, "pieczonym" is an instrumental singular form of the adjective "pieczony" (baked), referring to the noun "chlebem" (bread) which accompanies the verb "smak pieczonym chlebem".
Uwielbiam smak pieczonym chlebem.
I love the taste of baked bread.
In this context, "pieczonym" refers to the noun "zemniaków" (potatoes) in its instrumental case form, agreeing in case, gender, and number.
Mój tata jest mistrzem w przygotowywaniu pieczonych ziemniaków.
My dad is a master at preparing baked potatoes.
Here, "pieczonym" works as an adjective modifying the subject and provides additional context about the culinary action described by the verb..