Place a steamer insert into a saucepan and fill with water to just below the bottom of the steamer. Bring water to a boil. Add butternut squash cubes, cover, and steam until tender, 7 to 10 minutes. Transfer squash to a bowl and mash; measure 1/2 cup mashed squash and reserve.
Place the steamer insert back into the saucepan and refill with water to reach just below the bottom of the steamer. Bring water to a boil. Add cauliflower and broccoli, cover, and steam until tender, 2 to 6 minutes.
Process walnuts, almonds, and sunflower seeds together in a blender or food processor until mixture resembles coarse breadcrumbs. Add broccoli and cauliflower, blend until finely chopped and incorporated.
Blend 1/2 cup mashed squash, salt, cumin, and black pepper into the nuts mixture until well-mixed. If mixture is too thick to process, transfer it to a bowl and mix by hand.
Divide mixture into 4 equal portions and shape into patties.
Heat oil in a large skillet over medium-high heat. Cook patties in hot oil until browned and heated through, about 2 minutes per side.
Nutritional Facts
Per 4 servings
Calories: 250
Carbohydrate: 10g
Fat: 22g
Fiber: 4g
Protein: 7g
Sugar: 2g
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