The slightly bitter carrot tops plus the sweet carrots are a perfect combination. This is a vegetarian spaghetti.
The only vegetables in my fridge were these leafy carrots, so I made this. It's just a recipe off the top of my head.
I bet using shirasu or semi-dried salted tiny sardines (chirimenjako) flavored with soy sauce would taste good. Adding thinly cut bacon or wieners would probably make the kids happy.
Enjoy Japanese food around the world.