Wash very nicely Amaranth leaves.

Assemble ingredients, finely chop leaves and keep aside.

In moderately heated pan add Oil, allow to heat, add Nigella seeds and allow to sizzle. Add chopped Onion and sauté for 2 minutes (till golden brown)
Add chopped Amaranth leaves + green chilli + salt and sauté for 2-3 minutes.

Leaves shrinks, Cover and cook for 3-4 minutes. Uncover and sauté further 2 minutes, dish is done.