first part みじん切りだ包丁 (mijingiri da houchou) is from the Kiteretsu Daihyakka OP second part 包丁・ハサミ・カッター・ナイフ・ドス・キリ is the title of the Maximum the Hormone song. They overlap, so it's kind of a pun
Not sure what he means in the bottom panel. Probably some kind of memespeak. Edit: thanks henmere
Updated
Kiteretsu Daihyakkais that...Huh. So um...My husband always hums a song while making croquettesYou know, "what about the cabbage?"
It's the last line of the kiteretsu daihyakka OPWhat song is that?If you sing this song, it helps you remember how to make croquetteschop it fine, kitchen knife scissor cutter knife dagger cut
see comments... somehow related to why you always serve them without cabbage?
Huh? What's that about Yoake Mae Yori?