Greek Spinach Rice - Spanakorizo

extra virgin olive oil

finely chopped red onion

garlic clove, minced

long-grain rice (I used Jasmine)

(~ 1 pound/450 g) chopped fresh spinach, stems removed

water (more as needed)

chopped wild fennel fronds or dill (I used dill)

Sea salt and freshly ground black pepper

Juice of 2 lemons, strained (1 would have been enough for me)