Cook the amaranth: Wash and drain 1/4 cup amaranth. (You can skip the washing and directly cook the grain too). Heat a deep pan at medium, add washed amaranth to the pan and toast for half a minute. Add water, salt, thyme, paprika, mix and cook on medium heat. Reduce heat to medium-low once it starts to boil. Cook for 12-15 minutes or until the grains are tender. Stir once or twice towards the end to avoid sticking.
Meanwhile make the red pepper sauce: In a blender, blend everything under sauce. Taste and adjust.
Back to patties: Chop up the red pepper and chili, In a bowl, add black beans, peppers, salt and spices. Add the cooked amaranth and oil and give everything a good mix. Mash a bit to mash the black beans. Taste for spice and salt. Now add the brown rice flour to the mixture to make it less sticky. Add less or more just enough to handle the mixture without it being a sticky mess. Use a cookie cutter and press a good dollop of the mix into and through it to shape the patties on parchment lined baking sheet. Even them out and brush a little oil on top.(optional). I used 2 inch cookie cutter as my buns were 2.5 inches. and got 6 patties.
Bake at pre-heated 350 degrees F / 180ºc for 25 minutes.
Meanwhile, slice up the topping veggies and greens and set up the plates and buns for assembly. Grab your favorite drink and catch up on Instagram.
Assemble the burgers. Layer lettuce/greens, a fat juicy tomato slice, hot patties, a good load of the roasted red pepper sauce, red onion slices, cilantro and bun.