Buckwheat Wakame Bowl (or how to eat more seaweed)

For the grains: 2/3 cup buckwheat, picked over 1/3 cup white quinoa, unwashed 1 Tbsp olive oil 2 cups water 2 tsp Diamond Crystal Kosher salt (or 1 tsp table salt) For wakame: 2 Tbsp wakame 1 cup lukewarm water For serving: 1-2 Tbsp butter Sunny side u