In a mixing bowl, combine the 2 cups (400g/14oz) green banana biomass, 1¾ cup (230g/8oz) buckwheat flour, 2½ cups (220g/7.7oz) oat flour, 3 tbsp extra virgin olive oil, and ½ tsp ground sea salt. Using your hands knead the dough until it no longer sticks to your hands.
If the dough becomes dry and crumbly, gradually add water, a little at a time, while kneading the dough until it forms a smooth and soft, pliable ball.
Divide the dough into two equal parts for ease of rolling.
Place one portion of the dough between two sheets of parchment paper or on the silicone mat and roll it out as thinly as possible (about 1/8 inch thick).
Using a knife or a pizza cutter, cut the rolled-out dough into your desired cracker shapes.
Transfer the cut crackers, still on the parchment paper or silicone mat, onto a baking sheet.
Prick each cracker with a fork a few times to prevent excessive puffing during baking.
Sprinkle some flaky sea salt on top of the crackers.
Repeat the rolling and cutting process with the second portion of dough.
Preheat your oven to 350°F (175°C).
Bake the crackers for approximately 20-25 minutes, or until they turn golden and crispy.
Allow the crackers to cool on a wire rack before storing.