Thoroughly wash 200 g sushi rice until the water runs clear.
Let the rice sit in enough water to cover for around 10 minutes, then drain. This is optional but makes the rice plumper.
Add the sushi rice to a small saucepan along with 180 ml water. Place on the stove at medium-low heat, covered. Cook for around 10-15 minutes, until all the water is absorbed and the rice is soft, yet sticky.
While the rice is still hot, transfer it to a separate bowl. Season with 2 tablespoons rice vinegar, 1 tablespoon sugar, and 1 pinch salt. Mix with a wooden spoon. Don't use metal; it can react with the ingredients.
Let the rice cool. Keep it covered (with a damp tea towel or lid) to prevent drying out.
Make the Peanut Filling
Cut 60 g peanuts (roasted) roughly. You can keep some whole for texture, if you prefer. Add to a small bowl along with 2 tablespoons peanut butter and 2 teaspoons maple syrup. Mix well.
To roll out the peanut avocado rolls:
Wrap your bamboo sushi mat (makisu) in cling film, to prevent the rice from sticking.
Take your 1 ½ sheets nori. Cut a sheet of nori in half and place it shiny side down on the mat.
Spread a layer of sushi rice evenly on top of the sushi nori. Wet your hands to prevent the rice from sticking, or use a wettened sushi paddle.
Carefully flip the sushi nori so the rice is facing the clingfilm, while the sushi nori is facing upward.
Arrange a thin line of the peanut mixture along the length of the nori.
Top the peanut mixture with slices from 2 avocadoes .
Lift the bottom edge of the mat and carefully roll the rice around the filling. Press to ensure the roll is tight and even.
Finally, cut the sushi into eight even-sized pieces using a sharp, wet knife. Keep the blade wet between cuts.