Today's lunch too, but don't the meals Itsuki-san and Tanaka-san make have too few green and yellow vegetables?
Literal
Today [possessive-の] boxed-lunch [also-も] [but-だけど], Itsuki-san [and-と] Tanaka-san [possessive-の] make menu [topic-は] green-yellow vegetables [subject-が] few [isn't it-んじゃない]?
緑黄色野菜 'green and yellow vegetables' is a nutritional classification used in Japanese health education — vegetables like spinach, carrots, and pumpkin. お弁当 'boxed lunch' is a cultural staple. んじゃない？ at the end is a casual negative-question tag seeking agreement: 'isn't it the case that...?'