a fuego lento

over low heat

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phrase Rare #41,928
over low heat Used for cooking gently at a low temperature; it can also be used figuratively to describe something happening slowly over time.
SP: Cocina la salsa a fuego lento durante veinte minutos.
EN: Cook the sauce over low heat for twenty minutes.

Por favor, hierve a fuego lento las alubias durante un rato.

Please simmer the beans for a while.

Caracoles y setas cocidos a fuego lento en vino de Madeira.

Snails and mushrooms simmered in Madeira wine.

— Tampopo (1985)

Y déjalo cocinar a fuego lento.

And let it cook over low heat.

— Dangal (2016)

Asegúrate de cocinarlo a fuego lento para que no hierva.

Make sure to cook it over low heat so it doesn’t boil.

El miedo de envejecer es un miedo que me consume a fuego lento.

The fear of growing old is a fear that slowly consumes me.