Place hot dog half on a flat work surface. Cut a slit from the bottom to within 1 inch of the top. Turn the hot dog half 90 degrees to the uncut side and repeat. Cut each of 4 "legs" halfway down the middle to make 8 octopus "legs".
Bring a small pot of water to a boil; add hot dog octopus. Cook until heated through, 2 to 3 minutes. Drain.
Bring 2 cups water to a boil in the same pot. Add ramen noodles and cauliflower; cook until softened, 3 to 4 minutes. Stir in ramen seasoning until dissolved. Remove from heat; add spinach. Let stand until spinach wilts, about 3 minutes.
Assemble bento box with ramen noodle mixture and octopus hot dog.
recipepes.comOceans of Fun Bento, recipePT15MPT1H5455 calories