Why does my 10yo suddenly hate everything I cook?

This just started happening last month. He used to be pretty easy going about food. Now he's 'not in the mood' for literally everything - spaghetti, tacos, chicken, rice bowls, pizza (PIZZA!). He'll eat cereal or PB&J all day if I let him. I'm not about to become a short order cook but also don't want to starve the kid. Is this normal preteen stuff or am I doing something wrong? My 7yo eats fine so it's not like I'm cooking garbage.