Combine the flours: Add the whole-grain gluten-free flour blend, white gluten-free flour blend, oat flour, buckwheat flour, and rice flour to a large mixing bowl. Add the salt and stir thoroughly until all the flours are evenly combined.
Add the flaxseed and yeast: Add the ground flaxseed and active dry yeast. Stir again to distribute them evenly throughout the flour mixture.
Mix the dough: Add the honey and warm water. Stir gently with a wooden spoon or silicone spatula just until no dry patches remain. The dough should be soft, sticky, and slightly loose.
Avoid overmixing: Do not knead or vigorously beat the dough. Mix only until the ingredients are combined, and do not add extra flour to make the dough firmer.
Let the dough rise: Cover the bowl with plastic wrap or a clean kitchen towel. Leave it in a warm, draft-free place for approximately 1 hour, or until the dough looks puffy and has noticeably increased in volume.
Prepare the oven and pan: Near the end of the rising time, preheat the oven to 400°F (200°C). Line a large baking sheet with parchment paper.
Portion the rolls: Use a large ice cream scoop to divide the risen dough into 7 portions on the prepared baking sheet. Leave space between the portions so the rolls can expand.
Bake: Bake for approximately 30 minutes, or until the rolls are firm and lightly golden on the outside.
Cool: Remove the Gluten-Free Multigrain Rolls from the oven and transfer them to a wire rack. Allow them to cool for at least 15 minutes before slicing so the interior can set.