I will give you my recipe off the top of my head.
Simmered Kabocha
Ingredients
1 whole kabocha squash
2 cups of bonito dashi (or 2 cups of water + 1-2 tsp of powdered bonito broth)
2 tbsp soy sauce
2 tbsp sugar (or sugar substitute)
2 tbsp mirin (sweetened sake)
- make slices in the skin of the kabocha all over with a vegetable peeler. (Just some areas, not the whole squash)
- Stick in microwave for about 2 minutes
(Skip 1& 2 if you have a large kitchen knife, some arm strength and confidence you won’t kill yourself cutting this hard squash or precut kabocha) - Cut the squash into 2" square pieces (err on side of thicker is better)
- Place cut squash in a pot cover, try to keep it as one layer
- Pour in bonito broth and heat up
- When broth reaches boiling point, reduce to simmer and add sugar, mirin and soy sauce
- Simmer until a significant level of broth has evaporated off. (about 1/3rd)
Its served both hot or cold. Cold is less mushy and presents better.