Heat oven to 200 C.
Line a baking tray with baking paper.
Add all burger patty ingredients except for the olive oil and the assembly ingredients, to a food processor, pulse until well combined and incorporate.
Add extra breadcrumbs to get the desired consistency.
Form about 6 patties.
Heat a large skillet on medium with olive oil.
Fry the patties on each side for about 5 minutes or until crispy on the exterior.
Remove the patties to the prepared baking tray.
Bake for about 30 minutes. Set aside.
Meanwhile, prepare the buns.
Cut them in half to assemble.
Add a Tbsp sauce to the top of the first layer bun.
Top with sliced cucumbers, a beetroot pattie, sweet chili sauce, onions, and another bun half.
Serve with chili pickles on the side.